Flip flag to turn CrOS Browser Compositor Single Threaded

ui/compositor/test/in_process_context_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 "ui/compositor/test/in_process_context_factory.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/threading/thread.h"
 #include "cc/output/compositor_frame.h"
@@ skipping 56 matching lines @@
 InProcessContextFactory::InProcessContextFactory(
     bool context_factory_for_test,
     cc::SurfaceManager* surface_manager)
     : next_surface_id_namespace_(1u),
       use_test_surface_(true),
       context_factory_for_test_(context_factory_for_test),
       surface_manager_(surface_manager) {
   DCHECK_NE(gfx::GetGLImplementation(), gfx::kGLImplementationNone)
       << "If running tests, ensure that main() is calling "
       << "gfx::GLSurface::InitializeOneOffForTests()";
-
-#if defined(OS_CHROMEOS)
-  bool use_thread = !base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kUIDisableThreadedCompositing);
-#else
-  bool use_thread = false;
-#endif
-  if (use_thread) {
-    compositor_thread_.reset(new base::Thread("Browser Compositor"));
-    compositor_thread_->Start();
-  }
 }
 
 InProcessContextFactory::~InProcessContextFactory() {
   DCHECK(per_compositor_data_.empty());
 }
 
 void InProcessContextFactory::CreateOutputSurface(
     base::WeakPtr<Compositor> compositor,
     bool software_fallback) {
   DCHECK(!software_fallback);
@@ skipping 105 matching lines @@
 }
 
 void InProcessContextFactory::ResizeDisplay(ui::Compositor* compositor,
                                             const gfx::Size& size) {
   if (!per_compositor_data_.count(compositor))
     return;
   per_compositor_data_[compositor]->display()->Resize(size);
 }
 
 }  // namespace ui