Revert of Disallow posting tasks to SequencedWorkerPools by default.

content/renderer/render_thread_impl_browsertest.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 "content/renderer/render_thread_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/memory/discardable_memory.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "cc/output/buffer_to_texture_target_map.h"
 #include "content/app/mojo/mojo_init.h"
 #include "content/child/child_gpu_memory_buffer_manager.h"
 #include "content/common/in_process_child_thread_params.h"
 #include "content/common/resource_messages.h"
 #include "content/common/service_manager/child_connection.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/content_client.h"
@@ skipping 132 matching lines @@
 
  private:
   ~QuitOnTestMsgFilter() override {}
 
   base::MessageLoop* message_loop_;
 };
 
 class RenderThreadImplBrowserTest : public testing::Test {
  public:
   void SetUp() override {
-    // SequencedWorkerPool is enabled by default in tests. Disable it for this
-    // test to avoid a DCHECK failure when RenderThreadImpl::Init enables it.
-    // TODO(fdoray): Remove this once the SequencedWorkerPool to TaskScheduler
-    // redirection experiment concludes https://crbug.com/622400.
-    base::SequencedWorkerPool::DisableForProcessForTesting();
-
     content_renderer_client_.reset(new ContentRendererClient());
     SetRendererClientForTesting(content_renderer_client_.get());
 
     browser_threads_.reset(
         new TestBrowserThreadBundle(TestBrowserThreadBundle::IO_MAINLOOP));
     scoped_refptr<base::SingleThreadTaskRunner> io_task_runner =
         BrowserThread::GetTaskRunnerForThread(BrowserThread::IO);
 
     InitializeMojo();
     ipc_support_.reset(new mojo::edk::test::ScopedIPCSupport(io_task_runner));
@@ skipping 194 matching lines @@
                        // These formats are guaranteed to work on all platforms.
                        ::testing::Values(gfx::BufferFormat::R_8,
                                          gfx::BufferFormat::BGR_565,
                                          gfx::BufferFormat::RGBA_4444,
                                          gfx::BufferFormat::RGBA_8888,
                                          gfx::BufferFormat::BGRA_8888,
                                          gfx::BufferFormat::YVU_420)));
 
 }  // namespace
 }  // namespace content