XMLHttpRequest: return null upon failing responseArrayBuffer allocation.

third_party/WebKit/Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 2626 matching lines @@
 bool Internals::cursorUpdatePending() const {
   if (!frame())
     return false;
 
   return frame()->eventHandler().cursorUpdatePending();
 }
 
 DOMArrayBuffer* Internals::serializeObject(
     PassRefPtr<SerializedScriptValue> value) const {
   String stringValue = value->toWireString();
-  DOMArrayBuffer* buffer =
-      DOMArrayBuffer::createUninitialized(stringValue.length(), sizeof(UChar));
-  stringValue.copyTo(static_cast<UChar*>(buffer->data()), 0,
-                     stringValue.length());
+  DOMArrayBuffer* buffer = DOMArrayBuffer::createUninitializedOrNull(
+      stringValue.length(), sizeof(UChar));
+  if (buffer) {
+    stringValue.copyTo(static_cast<UChar*>(buffer->data()), 0,
+                       stringValue.length());
+  }
   return buffer;
 }
 
 PassRefPtr<SerializedScriptValue> Internals::deserializeBuffer(
     DOMArrayBuffer* buffer) const {
   String value(static_cast<const UChar*>(buffer->data()),
                buffer->byteLength() / sizeof(UChar));
   return SerializedScriptValue::create(value);
 }
 
@@ skipping 554 matching lines @@
 
 void Internals::crash() {
   CHECK(false) << "Intentional crash";
 }
 
 void Internals::setIsLowEndDevice(bool isLowEndDevice) {
   MemoryCoordinator::setIsLowEndDeviceForTesting(isLowEndDevice);
 }
 
 }  // namespace blink