Fix for crash when attaching a frame in WebUI renderer.

content/renderer/skia_benchmarking_extension.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/skia_benchmarking_extension.h"
 
 #include "base/base64.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/resources/picture.h"
 #include "content/public/renderer/v8_value_converter.h"
+#include "content/renderer/chrome_object_extensions_utils.h"
 #include "content/renderer/render_thread_impl.h"
 #include "gin/arguments.h"
 #include "gin/handle.h"
 #include "gin/object_template_builder.h"
 #include "skia/ext/benchmarking_canvas.h"
 #include "third_party/WebKit/public/platform/WebArrayBuffer.h"
 #include "third_party/WebKit/public/web/WebArrayBufferConverter.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebKit.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ skipping 47 matching lines @@
   if (context.IsEmpty())
     return;
 
   v8::Context::Scope context_scope(context);
 
   gin::Handle<SkiaBenchmarking> controller =
       gin::CreateHandle(isolate, new SkiaBenchmarking());
   if (controller.IsEmpty())
     return;
 
-  v8::Handle<v8::Object> global = context->Global();
-  v8::Handle<v8::Object> chrome =
-      global->Get(gin::StringToV8(isolate, "chrome"))->ToObject();
-  if (chrome.IsEmpty()) {
-    chrome = v8::Object::New(isolate);
-    global->Set(gin::StringToV8(isolate, "chrome"), chrome);
-  }
+  v8::Handle<v8::Object> chrome = GetOrCreateChromeObject(isolate,
+                                                          context->Global());
   chrome->Set(gin::StringToV8(isolate, "skiaBenchmarking"), controller.ToV8());
 }
 
 // static
 void SkiaBenchmarking::Initialize() {
   DCHECK(RenderThreadImpl::current());
   // FIXME: remove this after Skia updates SkGraphics::Init() to be
   //        thread-safe and idempotent.
   static bool skia_initialized = false;
   if (!skia_initialized) {
@@ skipping 206 matching lines @@
   v8::Handle<v8::Object> result = v8::Object::New(isolate);
   result->Set(v8::String::NewFromUtf8(isolate, "width"),
               v8::Number::New(isolate, picture->LayerRect().width()));
   result->Set(v8::String::NewFromUtf8(isolate, "height"),
               v8::Number::New(isolate, picture->LayerRect().height()));
 
   args->Return(result);
 }
 
 } // namespace content