Remove BrowserGpuChannelHostFactory usage of UnsafeGetMessageLoopForThread

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 61fd8409dfa26dbbb2a2e52266667ea9a2d9180f..2eebde9b7476312198c0b31db5d2c916f3bdbcbf 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1269,7 +1269,7 @@ void RenderThreadImpl::PostponeIdleNotification() {
 
 scoped_refptr<media::GpuVideoAcceleratorFactories>
 RenderThreadImpl::GetGpuFactories() {
-  DCHECK(IsMainThread());
+  DCHECK(GetMainTaskRunner()->BelongsToCurrentThread());
 
   scoped_refptr<GpuChannelHost> gpu_channel_host = GetGpuChannel();
   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
@@ -1323,7 +1323,7 @@ RenderThreadImpl::CreateOffscreenContext3d() {
 
 scoped_refptr<cc_blink::ContextProviderWebContext>
 RenderThreadImpl::SharedMainThreadContextProvider() {
-  DCHECK(IsMainThread());
+  DCHECK(GetMainTaskRunner()->BelongsToCurrentThread());
   if (!shared_main_thread_contexts_.get() ||
       shared_main_thread_contexts_->DestroyedOnMainThread()) {
     shared_main_thread_contexts_ = NULL;
@@ -1471,12 +1471,9 @@ bool RenderThreadImpl::IsGatherPixelRefsEnabled() {
   return is_gather_pixel_refs_enabled_;
 }
 
-bool RenderThreadImpl::IsMainThread() {
-  return !!current();
-}
-
-base::MessageLoop* RenderThreadImpl::GetMainLoop() {
-  return message_loop();
+scoped_refptr<base::SingleThreadTaskRunner>
+RenderThreadImpl::GetMainTaskRunner() {
+  return message_loop()->task_runner();
 }
 
 scoped_refptr<base::MessageLoopProxy> RenderThreadImpl::GetIOLoopProxy() {