Flip flag to turn CrOS Browser Compositor Single Threaded

ui/compositor/test/in_process_context_factory.cc

Index: ui/compositor/test/in_process_context_factory.cc
diff --git a/ui/compositor/test/in_process_context_factory.cc b/ui/compositor/test/in_process_context_factory.cc
index d51120a07e32d7de587930a38d9c5e011efa9416..d9e3dc4197de72d9f166b062399591292c8fdedf 100644
--- a/ui/compositor/test/in_process_context_factory.cc
+++ b/ui/compositor/test/in_process_context_factory.cc
@@ -67,17 +67,6 @@ InProcessContextFactory::InProcessContextFactory()
   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() {}