Change WGC3DInProcessCBImpl factories to return a base class pointer.

content/common/gpu/client/gl_helper_benchmark.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.
 
 // This file looks like a unit test, but it contains benchmarks and test
 // utilities intended for manual evaluation of the scalers in
 // gl_helper*. These tests produce output in the form of files and printouts,
 // but cannot really "fail". There is no point in making these tests part
 // of any test automation run.
 
@@ skipping 44 matching lines @@
 const char *kQualityNames[] = {
   "best",
   "good",
   "fast",
 };
 
 class GLHelperTest : public testing::Test {
  protected:
   virtual void SetUp() {
     WebGraphicsContext3D::Attributes attributes;
-    context_.reset(
-        webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl::
-        CreateOffscreenContext(attributes));
+    context_ = webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl::
+        CreateOffscreenContext(attributes);
     context_->makeContextCurrent();
 
     helper_.reset(new content::GLHelper(context_.get()));
     helper_scaling_.reset(new content::GLHelperScaling(
         context_.get(),
         helper_.get()));
   }
 
   virtual void TearDown() {
     helper_scaling_.reset(NULL);
@@ skipping 236 matching lines @@
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool pool;
 #endif
 #if defined(TOOLKIT_GTK)
   gfx::GtkInitFromCommandLine(*CommandLine::ForCurrentProcess());
 #endif
   gfx::GLSurface::InitializeOneOff();
 
   return content::UnitTestTestSuite(suite).Run();
 }