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

content/browser/gpu/browser_gpu_channel_host_factory.cc

Index: content/browser/gpu/browser_gpu_channel_host_factory.cc
diff --git a/content/browser/gpu/browser_gpu_channel_host_factory.cc b/content/browser/gpu/browser_gpu_channel_host_factory.cc
index 11bbe83fc2f56a68f95de6d33a75ce857aa8fa76..205542cdc81e918839841fbbeb55d99e16c6cadd 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.cc
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.cc
@@ -305,8 +305,8 @@ bool BrowserGpuChannelHostFactory::IsMainThread() {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
-scoped_refptr<base::MessageLoopProxy>
-BrowserGpuChannelHostFactory::GetIOLoopProxy() {
+scoped_refptr<base::SingleThreadTaskRunner>
+BrowserGpuChannelHostFactory::GetIOThreadTaskRunner() {
   return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
 }
 
@@ -353,12 +353,10 @@ CreateCommandBufferResult BrowserGpuChannelHostFactory::CreateViewCommandBuffer(
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) {
   CreateRequest request(route_id);
-  GetIOLoopProxy()->PostTask(FROM_HERE, base::Bind(
-        &BrowserGpuChannelHostFactory::CreateViewCommandBufferOnIO,
-        base::Unretained(this),
-        &request,
-        surface_id,
-        init_params));
+  GetIOThreadTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&BrowserGpuChannelHostFactory::CreateViewCommandBufferOnIO,
+                 base::Unretained(this), &request, surface_id, init_params));
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/125248 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(