content/common: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

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 6167af5f2bf733391e50164f75f14aaaf6d5202e..bb9e409d7024de96fb77b1aafc2828dc972909d6 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1470,8 +1470,9 @@ bool RenderThreadImpl::IsMainThread() {
   return !!current();
 }
 
-scoped_refptr<base::MessageLoopProxy> RenderThreadImpl::GetIOLoopProxy() {
-  return io_message_loop_proxy_;
+scoped_refptr<base::SingleThreadTaskRunner>
+RenderThreadImpl::GetIOThreadTaskRunner() {
+  return io_thread_task_runner_;
 }
 
 scoped_ptr<base::SharedMemory> RenderThreadImpl::AllocateSharedMemory(
@@ -1615,7 +1616,7 @@ GpuChannelHost* RenderThreadImpl::EstablishGpuChannelSync(
 
   // Cache some variables that are needed on the compositor thread for our
   // implementation of GpuChannelHostFactory.
-  io_message_loop_proxy_ = ChildProcess::current()->io_message_loop_proxy();
+  io_thread_task_runner_ = ChildProcess::current()->io_message_loop_proxy();
 
   gpu_channel_ =
       GpuChannelHost::Create(this,