Fix out-of-memory crashes related to ArrayBuffer 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 2109 matching lines @@
     }
 
     return result.toString();
 }
 
 bool Internals::cursorUpdatePending() const
 {
     return frame()->eventHandler().cursorUpdatePending();
 }
 
+void Internals::fakeOutOfMemoryForNextArrayBufferAllocation() const
+{
+    WTF::ArrayBufferContents::fakeOutOfMemoryForNextArrayBufferAllocationForTesting();
+}
+
 PassRefPtr<DOMArrayBuffer> Internals::serializeObject(PassRefPtr<SerializedScriptValue> value) const
 {
     String stringValue = value->toWireString();
-    RefPtr<DOMArrayBuffer> buffer = DOMArrayBuffer::createUninitialized(stringValue.length(), sizeof(UChar));
+    RefPtr<DOMArrayBuffer> buffer = DOMArrayBuffer::createUninitializedOrNull(stringValue.length(), sizeof(UChar));
+    RELEASE_ASSERT(buffer); // Crash here means out of memory.
     stringValue.copyTo(static_cast<UChar*>(buffer->data()), 0, stringValue.length());
     return buffer.release();
 }
 
 PassRefPtr<SerializedScriptValue> Internals::deserializeBuffer(PassRefPtr<DOMArrayBuffer> buffer) const
 {
     String value(static_cast<const UChar*>(buffer->data()), buffer->byteLength() / sizeof(UChar));
     return SerializedScriptValueFactory::instance().createFromWire(value);
 }
 
@@ skipping 419 matching lines @@
 
 void Internals::setMediaElementNetworkState(HTMLMediaElement* mediaElement, int state)
 {
     ASSERT(mediaElement);
     ASSERT(state >= HTMLMediaElement::NetworkState::NETWORK_EMPTY);
     ASSERT(state <= HTMLMediaElement::NetworkState::NETWORK_NO_SOURCE);
     mediaElement->setNetworkState(static_cast<WebMediaPlayer::NetworkState>(state));
 }
 
 } // namespace blink