typed arrays: make call-as-function work for ctors

Turn call-as-function calls into constructor calls. Makes the following
snippet work:

  var buf = ArrayBuffer(32);  // no 'new' but does the right thing

src/v8_typed_array.cc

@@ -88,7 +88,7 @@ class ArrayBuffer {
 
   static v8::Handle<v8::Value> V8New(const v8::Arguments& args) {
     if (!args.IsConstructCall())
-      return ThrowTypeError("Constructor cannot be called as a function.");
+      return node::FromConstructorTemplate(GetTemplate(), args);
 
     // To match Chrome, we allow "new ArrayBuffer()".
     // if (args.Length() != 1)
@@ -241,7 +241,7 @@ class TypedArray {
  private:
   static v8::Handle<v8::Value> V8New(const v8::Arguments& args) {
     if (!args.IsConstructCall())
-      return ThrowTypeError("Constructor cannot be called as a function.");
+      return node::FromConstructorTemplate(GetTemplate(), args);
 
     // To match Chrome, we allow "new Float32Array()".
     // if (args.Length() != 1)
@@ -613,7 +613,7 @@ class DataView {
  private:
   static v8::Handle<v8::Value> V8New(const v8::Arguments& args) {
     if (!args.IsConstructCall())
-      return ThrowTypeError("Constructor cannot be called as a function.");
+      return node::FromConstructorTemplate(GetTemplate(), args);
 
     if (args.Length() < 1)
       return ThrowError("Wrong number of arguments.");

test/simple/test-typed-arrays.js

@@ -50,8 +50,14 @@ var assert = require('assert');
   obj = new DataView(obj.buffer || obj);
   assert.equal(obj.toString(), '[object DataView]');
   assert.equal(Object.prototype.toString.call(obj), '[object DataView]');
+
+  // Calling constructor as function should work.
+  clazz(32);
 });
 
+// Calling constructor as function should work.
+DataView(ArrayBuffer(32));
+
 var buffer = new ArrayBuffer(16);
 var uint8 = new Uint8Array(buffer);
 var uint16 = new Uint16Array(buffer);