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

content/browser/geolocation/location_api_adapter_android.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_GEOLOCATION_LOCATION_API_ADAPTER_ANDROID_H_
 #define CONTENT_BROWSER_GEOLOCATION_LOCATION_API_ADAPTER_ANDROID_H_
 
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "base/synchronization/lock.h"
 
-namespace base {
-class SingleThreadTaskRunner;
-}
-
 namespace content {
 class LocationProviderAndroid;
 struct Geoposition;
 
 // Interacts with JNI and reports back to AndroidLocationProvider.
 // This class creates a LocationProvider java object and listens for
 // updates.
 // The simplified flow is:
 // GeolocationProvider runs in a Geolocation Thread and fetches geolocation data
 // from a LocationProvider.
@@ skipping 41 matching lines @@
   /// Called on the Geolocation thread.
   static void NotifyProviderNewGeoposition(const Geoposition& geoposition);
 
   base::android::ScopedJavaGlobalRef<jobject>
       java_location_provider_android_object_;
   LocationProviderAndroid* location_provider_;
 
   // Guards against the following member which is accessed on Geolocation
   // thread and the JNI main thread looper.
   base::Lock lock_;
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  scoped_refptr<base::MessageLoopProxy> message_loop_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_LOCATION_API_ADAPTER_ANDROID_H_