Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/public/test/frame_load_waiter.cc

Index: content/public/test/frame_load_waiter.cc
diff --git a/content/public/test/frame_load_waiter.cc b/content/public/test/frame_load_waiter.cc
index c9cee107d590af0a88bde83e11038c0cb3de51b5..6da69afb8ca7ffb0829dc853cefae814d45b9a7d 100644
--- a/content/public/test/frame_load_waiter.cc
+++ b/content/public/test/frame_load_waiter.cc
@@ -5,8 +5,7 @@
 #include "content/public/test/frame_load_waiter.h"
 
 #include "base/location.h"
-#include "base/single_thread_task_runner.h"
-#include "base/thread_task_runner_handle.h"
+#include "base/message_loop/message_loop.h"
 
 namespace content {
 
@@ -22,8 +21,7 @@ void FrameLoadWaiter::Wait() {
 void FrameLoadWaiter::DidFinishLoad() {
   // Post a task to quit instead of quitting directly, since the load completion
   // may trigger other IPCs that tests are expecting.
-  base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
-                                                run_loop_.QuitClosure());
+  base::MessageLoop::current()->PostTask(FROM_HERE, run_loop_.QuitClosure());
 }
 
 }  // namespace content