Change WGC3DInProcessCBImpl factories to return a base class pointer.

webkit/support/test_webkit_platform_support.cc

 // Copyright (c) 2012 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 "webkit/support/test_webkit_platform_support.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/metrics/stats_counters.h"
@@ skipping 329 matching lines @@
 WebKit::WebThemeEngine* TestWebKitPlatformSupport::themeEngine() {
   return active_theme_engine_;
 }
 #endif
 
 WebKit::WebGraphicsContext3D*
 TestWebKitPlatformSupport::createOffscreenGraphicsContext3D(
     const WebKit::WebGraphicsContext3D::Attributes& attributes) {
   using webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl;
   return WebGraphicsContext3DInProcessCommandBufferImpl::CreateOffscreenContext(
-      attributes);
+      attributes).release();
 }
 
 WebKit::WebGraphicsContext3DProvider* TestWebKitPlatformSupport::
     createSharedOffscreenGraphicsContext3DProvider() {
   main_thread_contexts_ =
       webkit::gpu::TestContextProviderFactory::GetInstance()->
           OffscreenContextProviderForMainThread();
   if (!main_thread_contexts_.get())
     return NULL;
   return new webkit::gpu::WebGraphicsContext3DProviderImpl(
@@ skipping 145 matching lines @@
   return view.release();
 }
 
 WebKit::WebLayerTreeView*
     TestWebKitPlatformSupport::createLayerTreeViewForTesting(
         TestViewType type) {
   DCHECK_EQ(TestViewTypeUnitTest, type);
   return createLayerTreeViewForTesting();
 }