Revert of Remove calls to MessageLoop::current() in content.

content/browser/android/java/java_bridge_thread.cc

Index: content/browser/android/java/java_bridge_thread.cc
diff --git a/content/browser/android/java/java_bridge_thread.cc b/content/browser/android/java/java_bridge_thread.cc
index 4c8b24edc4012c00b3534d6b5b4e008a89219bad..6c69bc0d5716f11a902978659b18238eff20530f 100644
--- a/content/browser/android/java/java_bridge_thread.cc
+++ b/content/browser/android/java/java_bridge_thread.cc
@@ -6,7 +6,6 @@
 
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
-#include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
 #include "build/build_config.h"
 
@@ -34,10 +33,8 @@
 
 // static
 bool JavaBridgeThread::CurrentlyOn() {
-  return g_background_thread.Get()
-      .message_loop()
-      ->task_runner()
-      ->BelongsToCurrentThread();
+  return base::MessageLoop::current() ==
+         g_background_thread.Get().message_loop();
 }
 
 // static