Remove offscreen compositor contexts.

content/test/test_context_provider_factory.cc

-// Copyright 2014 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/test/test_context_provider_factory.h"
-
-#include "base/logging.h"
-#include "cc/output/context_provider.h"
-#include "webkit/common/gpu/context_provider_in_process.h"
-
-namespace content {
-
-static TestContextProviderFactory* context_provider_instance = NULL;
-
-// static
-TestContextProviderFactory* TestContextProviderFactory::GetInstance() {
-  if (!context_provider_instance)
-    context_provider_instance = new TestContextProviderFactory();
-  return context_provider_instance;
-}
-
-TestContextProviderFactory::TestContextProviderFactory() {}
-
-TestContextProviderFactory::~TestContextProviderFactory() {}
-
-scoped_refptr<cc::ContextProvider> TestContextProviderFactory::
-    OffscreenContextProviderForMainThread() {
-  if (!main_thread_.get() || main_thread_->DestroyedOnMainThread()) {
-    bool lose_context_when_out_of_memory = false;
-    main_thread_ = webkit::gpu::ContextProviderInProcess::CreateOffscreen(
-        lose_context_when_out_of_memory);
-    if (main_thread_.get() && !main_thread_->BindToCurrentThread())
-      main_thread_ = NULL;
-  }
-  return main_thread_;
-}
-
-}  // namespace content