content: Use base::MessageLoop.

content/common/gpu/gpu_channel.cc

Index: content/common/gpu/gpu_channel.cc
diff --git a/content/common/gpu/gpu_channel.cc b/content/common/gpu/gpu_channel.cc
index 1cef356b5b79c8978aab976468026026a68dde97..d116d845df2a91cbf9ba10b5b3a70dcb1528f210 100644
--- a/content/common/gpu/gpu_channel.cc
+++ b/content/common/gpu/gpu_channel.cc
@@ -585,7 +585,7 @@ void GpuChannel::OnScheduled() {
   // defer newly received messages until the ones in the queue have all been
   // handled by HandleMessage. HandleMessage is invoked as a
   // task to prevent reentrancy.
-  MessageLoop::current()->PostTask(
+  base::MessageLoop::current()->PostTask(
       FROM_HERE,
       base::Bind(&GpuChannel::HandleMessage, weak_factory_.GetWeakPtr()));
   handle_messages_scheduled_ = true;
@@ -703,7 +703,7 @@ void GpuChannel::LoseAllContexts() {
 }
 
 void GpuChannel::DestroySoon() {
-  MessageLoop::current()->PostTask(
+  base::MessageLoop::current()->PostTask(
       FROM_HERE, base::Bind(&GpuChannel::OnDestroy, this));
 }