Remove offscreen compositor contexts.

cc/resources/resource_provider_unittest.cc

 // Copyright 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 "cc/resources/resource_provider.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 
@@ skipping 3150 matching lines @@
 void InitializeGLAndCheck(ContextSharedData* shared_data,
                           ResourceProvider* resource_provider,
                           FakeOutputSurface* output_surface) {
   scoped_ptr<ResourceProviderContext> context_owned =
       ResourceProviderContext::Create(shared_data);
   ResourceProviderContext* context = context_owned.get();
 
   scoped_refptr<TestContextProvider> context_provider =
       TestContextProvider::Create(
           context_owned.PassAs<TestWebGraphicsContext3D>());
-  output_surface->InitializeAndSetContext3d(context_provider, NULL);
+  output_surface->InitializeAndSetContext3d(context_provider);
   resource_provider->InitializeGL();
 
   CheckCreateResource(ResourceProvider::GLTexture, resource_provider, context);
 }
 
 TEST(ResourceProviderTest, BasicInitializeGLSoftware) {
   scoped_ptr<ContextSharedData> shared_data = ContextSharedData::Create();
   FakeOutputSurfaceClient client;
   scoped_ptr<FakeOutputSurface> output_surface(
       FakeOutputSurface::CreateDeferredGL(
@@ skipping 157 matching lines @@
     resource_provider->AllocateForTesting(id);
     Mock::VerifyAndClearExpectations(context);
 
     DCHECK_EQ(10u, context->PeekTextureId());
     resource_provider->DeleteResource(id);
   }
 }
 
 }  // namespace
 }  // namespace cc