content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/public/browser/browser_thread.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_PUBLIC_BROWSER_BROWSER_THREAD_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_THREAD_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 
 namespace base {
 class MessageLoop;
 class SequencedWorkerPool;
 class Thread;
 }
 
@@ skipping 56 matching lines @@
     // This is the thread to handle slow HTTP cache operations.
     CACHE,
 
     // This is the thread that processes non-blocking IO, i.e. IPC and network.
     // Blocking IO should happen on other threads like DB, FILE,
     // FILE_USER_BLOCKING and CACHE depending on the usage.
     IO,
 
     // NOTE: do not add new threads here that are only used by a small number of
     // files. Instead you should just use a Thread class and pass its
-    // MessageLoopProxy around. Named threads there are only for threads that
+    // task runner around. Named threads there are only for threads that
     // are used in many places.
 
     // This identifier does not represent a thread.  Instead it counts the
     // number of well-known threads.  Insert new well-known threads before this
     // identifier.
     ID_COUNT
   };
 
   // These are the same methods in message_loop.h, but are guaranteed to either
   // get posted to the MessageLoop if it's still alive, or be deleted otherwise.
@@ skipping 21 matching lines @@
       const tracked_objects::Location& from_here,
       const base::Closure& task,
       const base::Closure& reply);
 
   template <typename ReturnType, typename ReplyArgType>
   static bool PostTaskAndReplyWithResult(
       ID identifier,
       const tracked_objects::Location& from_here,
       const base::Callback<ReturnType(void)>& task,
       const base::Callback<void(ReplyArgType)>& reply) {
-    scoped_refptr<base::MessageLoopProxy> message_loop_proxy =
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner =
         GetMessageLoopProxyForThread(identifier);
-    return base::PostTaskAndReplyWithResult(
-        message_loop_proxy.get(), from_here, task, reply);
+    return base::PostTaskAndReplyWithResult(task_runner.get(), from_here, task,
+                                            reply);
   }
 
   template <class T>
   static bool DeleteSoon(ID identifier,
                          const tracked_objects::Location& from_here,
                          const T* object) {
     return GetMessageLoopProxyForThread(identifier)->DeleteSoon(
         from_here, object);
   }
 
@@ skipping 62 matching lines @@
 
   // Callable on any thread.  Returns whether the threads message loop is valid.
   // If this returns false it means the thread is in the process of shutting
   // down.
   static bool IsMessageLoopValid(ID identifier) WARN_UNUSED_RESULT;
 
   // If the current message loop is one of the known threads, returns true and
   // sets identifier to its ID.  Otherwise returns false.
   static bool GetCurrentThreadIdentifier(ID* identifier) WARN_UNUSED_RESULT;
 
-  // Callers can hold on to a refcounted MessageLoopProxy beyond the lifetime
+  // Callers can hold on to a refcounted task runner beyond the lifetime
   // of the thread.
-  static scoped_refptr<base::MessageLoopProxy> GetMessageLoopProxyForThread(
-      ID identifier);
+  static scoped_refptr<base::SingleThreadTaskRunner>
+  GetMessageLoopProxyForThread(ID identifier);
 
   // Returns a pointer to the thread's message loop, which will become
   // invalid during shutdown, so you probably shouldn't hold onto it.
   //
   // This must not be called before the thread is started, or after
   // the thread is stopped, or it will DCHECK.
   //
   // Ownership remains with the BrowserThread implementation, so you
   // must not delete the pointer.
   static base::MessageLoop* UnsafeGetMessageLoopForThread(ID identifier);
@@ skipping 64 matching lines @@
  private:
   friend class BrowserThreadImpl;
 
   BrowserThread() {}
   DISALLOW_COPY_AND_ASSIGN(BrowserThread);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_THREAD_H_