diff --git a/deps/v8/build/common.gypi b/deps/v8/build/common.gypi
index 44bebae935..e68ee15fde 100644
--- a/deps/v8/build/common.gypi
+++ b/deps/v8/build/common.gypi
@@ -160,7 +160,7 @@
           [ 'v8_use_arm_eabi_hardfloat=="true"', {
             'defines': [
               'USE_EABI_HARDFLOAT=1',
-              'CAN_USE_VFP2_INSTRUCTIONS',
+              'CAN_USE_VFP3_INSTRUCTIONS',
             ],
             'target_conditions': [
               ['_toolset=="target"', {
@@ -399,6 +399,15 @@
           }],
           ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd" \
             or OS=="android"', {
+            'cflags!': [
+              '-O2',
+              '-Os',
+            ],
+            'cflags': [
+              '-fdata-sections',
+              '-ffunction-sections',
+              '-O3',
+            ],
             'conditions': [
               [ 'gcc_version==44 and clang==0', {
                 'cflags': [
diff --git a/deps/v8/src/hydrogen-instructions.cc b/deps/v8/src/hydrogen-instructions.cc
index 0e6ea00058..c1245b2fb6 100644
--- a/deps/v8/src/hydrogen-instructions.cc
+++ b/deps/v8/src/hydrogen-instructions.cc
@@ -801,6 +801,13 @@ void HClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
 }
 
 
+void HWrapReceiver::PrintDataTo(StringStream* stream) {
+  receiver()->PrintNameTo(stream);
+  stream->Add(" ");
+  function()->PrintNameTo(stream);
+}
+
+
 void HAccessArgumentsAt::PrintDataTo(StringStream* stream) {
   arguments()->PrintNameTo(stream);
   stream->Add("[");
diff --git a/deps/v8/src/hydrogen-instructions.h b/deps/v8/src/hydrogen-instructions.h
index 161e6542d9..7225791cd7 100644
--- a/deps/v8/src/hydrogen-instructions.h
+++ b/deps/v8/src/hydrogen-instructions.h
@@ -2823,6 +2823,8 @@ class HWrapReceiver: public HTemplateInstruction<2> {
 
   virtual HValue* Canonicalize();
 
+  virtual void PrintDataTo(StringStream* stream);
+
   DECLARE_CONCRETE_INSTRUCTION(WrapReceiver)
 };
 
diff --git a/deps/v8/src/hydrogen.cc b/deps/v8/src/hydrogen.cc
index 97306a1659..bdca43ed52 100644
--- a/deps/v8/src/hydrogen.cc
+++ b/deps/v8/src/hydrogen.cc
@@ -7493,7 +7493,10 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
     return true;
   } else {
     // We are inside inlined function and we know exactly what is inside
-    // arguments object.
+    // arguments object. But we need to be able to materialize at deopt.
+    // TODO(mstarzinger): For now we just ensure arguments are pushed
+    // right after HEnterInlined, but we could be smarter about this.
+    EnsureArgumentsArePushedForAccess();
     HValue* context = environment()->LookupContext();
 
     HValue* wrapped_receiver =
diff --git a/deps/v8/src/log-utils.cc b/deps/v8/src/log-utils.cc
index a66db3d931..d8d92cbe21 100644
--- a/deps/v8/src/log-utils.cc
+++ b/deps/v8/src/log-utils.cc
@@ -107,9 +107,6 @@ void Log::Initialize() {
                 // one character so we can escape the loop properly.
                 p--;
                 break;
-              case 'p':
-                stream.Add("%d", OS::GetCurrentProcessId());
-                break;
               case 't': {
                 // %t expands to the current time in milliseconds.
                 double time = OS::TimeCurrentMillis();
diff --git a/deps/v8/src/mips/codegen-mips.cc b/deps/v8/src/mips/codegen-mips.cc
index 0119c11f53..1da8089635 100644
--- a/deps/v8/src/mips/codegen-mips.cc
+++ b/deps/v8/src/mips/codegen-mips.cc
@@ -246,7 +246,7 @@ void ElementsTransitionGenerator::GenerateSmiToDouble(
                       HeapObject::kMapOffset,
                       a3,
                       t5,
-                      kRAHasBeenSaved,
+                      kRAHasNotBeenSaved,
                       kDontSaveFPRegs,
                       OMIT_REMEMBERED_SET,
                       OMIT_SMI_CHECK);
@@ -517,6 +517,50 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
 }
 
 
+void SeqStringSetCharGenerator::Generate(MacroAssembler* masm,
+                                         String::Encoding encoding,
+                                         Register string,
+                                         Register index,
+                                         Register value) {
+  if (FLAG_debug_code) {
+    __ And(at, index, Operand(kSmiTagMask));
+    __ Check(eq, "Non-smi index", at, Operand(zero_reg));
+    __ And(at, value, Operand(kSmiTagMask));
+    __ Check(eq, "Non-smi value", at, Operand(zero_reg));
+
+    __ lw(at, FieldMemOperand(string, String::kLengthOffset));
+    __ Check(lt, "Index is too large", at, Operand(index));
+
+    __ Check(ge, "Index is negative", index, Operand(Smi::FromInt(0)));
+
+    __ lw(at, FieldMemOperand(string, HeapObject::kMapOffset));
+    __ lbu(at, FieldMemOperand(at, Map::kInstanceTypeOffset));
+
+    __ And(at, at, Operand(kStringRepresentationMask | kStringEncodingMask));
+    static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
+    static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
+    __ Check(eq, "Unexpected string type", at,
+        Operand(encoding == String::ONE_BYTE_ENCODING
+                    ? one_byte_seq_type : two_byte_seq_type));
+  }
+
+  __ Addu(at,
+          string,
+          Operand(SeqString::kHeaderSize - kHeapObjectTag));
+  __ SmiUntag(value);
+  STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
+  if (encoding == String::ONE_BYTE_ENCODING) {
+    __ SmiUntag(index);
+    __ Addu(at, at, index);
+    __ sb(value, MemOperand(at));
+  } else {
+    // No need to untag a smi for two-byte addressing.
+    __ Addu(at, at, index);
+    __ sh(value, MemOperand(at));
+  }
+}
+
+
 static MemOperand ExpConstant(int index, Register base) {
   return MemOperand(base, index * kDoubleSize);
 }
diff --git a/deps/v8/src/mips/full-codegen-mips.cc b/deps/v8/src/mips/full-codegen-mips.cc
index f9f8c404c2..0835bf20a0 100644
--- a/deps/v8/src/mips/full-codegen-mips.cc
+++ b/deps/v8/src/mips/full-codegen-mips.cc
@@ -3146,6 +3146,38 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(a2);
+  __ pop(a1);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::ONE_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, v0, a1, a2);
+  context()->Plug(v0);
+}
+
+
+void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(a2);
+  __ pop(a1);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::TWO_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, v0, a1, a2);
+  context()->Plug(v0);
+}
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();
diff --git a/deps/v8/src/mips/lithium-codegen-mips.cc b/deps/v8/src/mips/lithium-codegen-mips.cc
index 22352e1184..fd7af9f0f5 100644
--- a/deps/v8/src/mips/lithium-codegen-mips.cc
+++ b/deps/v8/src/mips/lithium-codegen-mips.cc
@@ -1389,6 +1389,15 @@ void LCodeGen::DoDateField(LDateField* instr) {
 }
 
 
+void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) {
+  SeqStringSetCharGenerator::Generate(masm(),
+                                      instr->encoding(),
+                                      ToRegister(instr->string()),
+                                      ToRegister(instr->index()),
+                                      ToRegister(instr->value()));
+}
+
+
 void LCodeGen::DoBitNotI(LBitNotI* instr) {
   Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
diff --git a/deps/v8/src/mips/lithium-mips.cc b/deps/v8/src/mips/lithium-mips.cc
index 56dd33d246..521b38d0cd 100644
--- a/deps/v8/src/mips/lithium-mips.cc
+++ b/deps/v8/src/mips/lithium-mips.cc
@@ -1531,6 +1531,16 @@ LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
+  LOperand* string = UseRegister(instr->string());
+  LOperand* index = UseRegister(instr->index());
+  LOperand* value = UseRegister(instr->value());
+  LSeqStringSetChar* result =
+      new(zone()) LSeqStringSetChar(instr->encoding(), string, index, value);
+  return DefineAsRegister(result);
+}
+
+
 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
   LOperand* value = UseRegisterOrConstantAtStart(instr->index());
   LOperand* length = UseRegister(instr->length());
diff --git a/deps/v8/src/mips/lithium-mips.h b/deps/v8/src/mips/lithium-mips.h
index 17ef24cb1a..b2ed72a563 100644
--- a/deps/v8/src/mips/lithium-mips.h
+++ b/deps/v8/src/mips/lithium-mips.h
@@ -148,6 +148,7 @@ class LCodeGen;
   V(Random)                                     \
   V(RegExpLiteral)                              \
   V(Return)                                     \
+  V(SeqStringSetChar)                           \
   V(ShiftI)                                     \
   V(SmiTag)                                     \
   V(SmiUntag)                                   \
@@ -1143,6 +1144,30 @@ class LDateField: public LTemplateInstruction<1, 1, 1> {
 };
 
 
+class LSeqStringSetChar: public LTemplateInstruction<1, 3, 0> {
+ public:
+  LSeqStringSetChar(String::Encoding encoding,
+                    LOperand* string,
+                    LOperand* index,
+                    LOperand* value) : encoding_(encoding) {
+    inputs_[0] = string;
+    inputs_[1] = index;
+    inputs_[2] = value;
+  }
+
+  String::Encoding encoding() { return encoding_; }
+  LOperand* string() { return inputs_[0]; }
+  LOperand* index() { return inputs_[1]; }
+  LOperand* value() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(SeqStringSetChar, "seq-string-set-char")
+  DECLARE_HYDROGEN_ACCESSOR(SeqStringSetChar)
+
+ private:
+  String::Encoding encoding_;
+};
+
+
 class LThrow: public LTemplateInstruction<0, 1, 0> {
  public:
   explicit LThrow(LOperand* value) {
diff --git a/deps/v8/src/v8utils.h b/deps/v8/src/v8utils.h
index 111abdf8b8..9072b4e285 100644
--- a/deps/v8/src/v8utils.h
+++ b/deps/v8/src/v8utils.h
@@ -209,8 +209,6 @@ INLINE(void CopyChars(sinkchar* dest, const sourcechar* src, int chars));
 
 template <typename sourcechar, typename sinkchar>
 void CopyChars(sinkchar* dest, const sourcechar* src, int chars) {
-  ASSERT(chars >= 0);
-  if (chars == 0) return;
   sinkchar* limit = dest + chars;
 #ifdef V8_HOST_CAN_READ_UNALIGNED
   if (sizeof(*dest) == sizeof(*src)) {
diff --git a/deps/v8/src/version.cc b/deps/v8/src/version.cc
index 34ba3fe63a..7d317418d8 100644
--- a/deps/v8/src/version.cc
+++ b/deps/v8/src/version.cc
@@ -35,7 +35,7 @@
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     15
 #define BUILD_NUMBER      11
-#define PATCH_LEVEL       7
+#define PATCH_LEVEL       10
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
 #define IS_CANDIDATE_VERSION 0
diff --git a/deps/v8/test/mjsunit/regress/regress-2489.js b/deps/v8/test/mjsunit/regress/regress-2489.js
new file mode 100644
index 0000000000..882c4f794a
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2489.js
@@ -0,0 +1,50 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+"use strict";
+
+function f(a, b) {
+  return g("c", "d");
+}
+
+function g(a, b) {
+  g.constructor.apply(this, arguments);
+}
+
+g.constructor = function(a, b) {
+  assertEquals("c", a);
+  assertEquals("d", b);
+}
+
+f("a", "b");
+f("a", "b");
+%OptimizeFunctionOnNextCall(f);
+f("a", "b");
+g.x = "deopt";
+f("a", "b");
diff --git a/deps/v8/tools/run-tests.py b/deps/v8/tools/run-tests.py
index c09ea064d9..f20af169d2 100755
--- a/deps/v8/tools/run-tests.py
+++ b/deps/v8/tools/run-tests.py
@@ -155,7 +155,7 @@ def ProcessOptions(options):
     options.mode = tokens[1]
   options.mode = options.mode.split(",")
   for mode in options.mode:
-    if not mode in ["debug", "release"]:
+    if not mode.lower() in ["debug", "release"]:
       print "Unknown mode %s" % mode
       return False
   if options.arch in ["auto", "native"]: