benchmark: update callbacks only receive data

Since the SlabAllocator was removed the buffer length/offset is no
longer sent to the onread callback. The benchmarks have been updated to
reflect that.

benchmark/net/tcp-raw-c2s.js

@@ -57,7 +57,7 @@ function server() {
       bench.end((bytes * 8) / (1024 * 1024 * 1024));
     }, dur * 1000);
 
-    clientHandle.onread = function(buffer, offset, length) {
+    clientHandle.onread = function(buffer) {
       // we're not expecting to ever get an EOF from the client.
       // just lots of data forever.
       if (!buffer)
@@ -65,8 +65,7 @@ function server() {
 
       // don't slice the buffer.  the point of this is to isolate, not
       // simulate real traffic.
-      // var chunk = buffer.slice(offset, offset + length);
-      bytes += length;
+      bytes += buffer.length;
     };
 
     clientHandle.readStart();

benchmark/net/tcp-raw-pipe.js

@@ -48,14 +48,13 @@ function server() {
     if (!clientHandle)
       fail('connect');
 
-    clientHandle.onread = function(buffer, offset, length) {
+    clientHandle.onread = function(buffer) {
       // we're not expecting to ever get an EOF from the client.
       // just lots of data forever.
       if (!buffer)
         fail('read');
 
-      var chunk = buffer.slice(offset, offset + length);
-      var writeReq = clientHandle.writeBuffer(chunk);
+      var writeReq = clientHandle.writeBuffer(buffer);
 
       if (!writeReq)
         fail('write');
@@ -99,11 +98,11 @@ function client() {
 
   clientHandle.readStart();
 
-  clientHandle.onread = function(buffer, start, length) {
+  clientHandle.onread = function(buffer) {
     if (!buffer)
       fail('read');
 
-    bytes += length;
+    bytes += buffer.length;
   };
 
   connectReq.oncomplete = function() {

benchmark/net/tcp-raw-s2c.js

@@ -111,7 +111,7 @@ function client() {
 
   connectReq.oncomplete = function() {
     var bytes = 0;
-    clientHandle.onread = function(buffer, offset, length) {
+    clientHandle.onread = function(buffer) {
       // we're not expecting to ever get an EOF from the client.
       // just lots of data forever.
       if (!buffer)
@@ -119,8 +119,7 @@ function client() {
 
       // don't slice the buffer.  the point of this is to isolate, not
       // simulate real traffic.
-      // var chunk = buffer.slice(offset, offset + length);
-      bytes += length;
+      bytes += buffer.length;
     };
 
     clientHandle.readStart();