Fix memory leaks from adding GPU memory to task manager

content/browser/gpu/gpu_process_host.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_GPU_GPU_PROCESS_HOST_H_
 #define CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_
 
 #include <map>
 #include <queue>
 #include <string>
@@ skipping 43 matching lines @@
   // Creates a new GpuProcessHost or gets an existing one, resulting in the
   // launching of a GPU process if required.  Returns null on failure. It
   // is not safe to store the pointer once control has returned to the message
   // loop as it can be destroyed. Instead store the associated GPU host ID.
   // This could return NULL if GPU access is not allowed (blacklisted).
   static GpuProcessHost* Get(GpuProcessKind kind,
                              content::CauseForGpuLaunch cause);
 
   // Helper function to send the given message to the GPU process on the IO
   // thread.  Calls Get and if a host is returned, sends it.  Can be called from
-  // any thread.
+  // any thread.  Deletes the message if it cannot be sent.
   CONTENT_EXPORT static void SendOnIO(GpuProcessKind kind,
                                       content::CauseForGpuLaunch cause,
                                       IPC::Message* message);
 
   // Get the GPU process host for the GPU process with the given ID. Returns
   // null if the process no longer exists.
   static GpuProcessHost* FromID(int host_id);
   int host_id() const { return host_id_; }
 
   // IPC::Sender implementation.
@@ skipping 120 matching lines @@
   static bool gpu_enabled_;
 
   static bool hardware_gpu_enabled_;
 
   scoped_ptr<BrowserChildProcessHostImpl> process_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };
 
 #endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_