cc: Drop ContextProvider references on the impl thread before quitting

cc/test/pixel_test.cc

 // Copyright 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 "cc/test/pixel_test.h"
 
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/output/gl_renderer.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/software_renderer.h"
 #include "cc/resources/resource_provider.h"
+#include "cc/resources/texture_mailbox_deleter.h"
 #include "cc/test/paths.h"
 #include "cc/test/pixel_test_output_surface.h"
 #include "cc/test/pixel_test_software_output_device.h"
 #include "cc/test/pixel_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_implementation.h"
 #include "webkit/common/gpu/context_provider_in_process.h"
 #include "webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
 
 namespace cc {
@@ skipping 128 matching lines @@
 void PixelTest::SetUpGLRenderer(bool use_skia_gpu_backend) {
   CHECK(fake_client_);
   CHECK(gfx::InitializeGLBindings(gfx::kGLImplementationOSMesaGL));
 
   using webkit::gpu::ContextProviderInProcess;
   output_surface_.reset(new PixelTestOutputSurface(
       ContextProviderInProcess::CreateOffscreen()));
   output_surface_->BindToClient(fake_client_.get());
 
   resource_provider_ = ResourceProvider::Create(output_surface_.get(), 0);
+
+  texture_mailbox_deleter_ = make_scoped_ptr(new TextureMailboxDeleter);
+
   renderer_ = GLRenderer::Create(fake_client_.get(),
                                  &settings_,
                                  output_surface_.get(),
                                  resource_provider_.get(),
+                                 texture_mailbox_deleter_.get(),
                                  0,
                                  use_skia_gpu_backend).PassAs<DirectRenderer>();
 }
 
 void PixelTest::ForceExpandedViewport(gfx::Size surface_expansion,
                                       gfx::Vector2d viewport_offset) {
   static_cast<PixelTestOutputSurface*>(output_surface_.get())
       ->set_surface_expansion_size(surface_expansion);
   static_cast<PixelTestOutputSurface*>(output_surface_.get())
       ->set_viewport_offset(viewport_offset);
@@ skipping 22 matching lines @@
   output_surface_->BindToClient(fake_client_.get());
   resource_provider_ = ResourceProvider::Create(output_surface_.get(), 0);
   renderer_ = SoftwareRenderer::Create(fake_client_.get(),
                                        &settings_,
                                        output_surface_.get(),
                                        resource_provider_.get())
                   .PassAs<DirectRenderer>();
 }
 
 }  // namespace cc