Histograms - Support histograms for Plugins, GPU

content/common/child_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_COMMON_CHILD_THREAD_H_
 #define CONTENT_COMMON_CHILD_THREAD_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/tracked_objects.h"
 #include "content/common/content_export.h"
 #include "content/common/message_router.h"
 #include "webkit/glue/resource_loader_bridge.h"
 
 class FileSystemDispatcher;
 class MessageLoop;
 class QuotaDispatcher;
 class ResourceDispatcher;
 class SocketStreamDispatcher;
 
+namespace content {
+class ChildHistogramMessageFilter;
+}
+
 namespace IPC {
 class SyncChannel;
 class SyncMessageFilter;
 }
 
 namespace WebKit {
 class WebFrame;
 }
 
 // The main thread of a child process derives from this class.
@@ skipping 39 matching lines @@
   }
 
   QuotaDispatcher* quota_dispatcher() const {
     return quota_dispatcher_.get();
   }
 
   // Safe to call on any thread, as long as it's guaranteed that the thread's
   // lifetime is less than the main thread.
   IPC::SyncMessageFilter* sync_message_filter();
 
+  content::ChildHistogramMessageFilter* child_histogram_message_filter() const {
+    return histogram_message_filter_.get();
+  }
+
   MessageLoop* message_loop();
 
   // Returns the one child thread.
   static ChildThread* current();
 
   virtual bool IsWebFrameValid(WebKit::WebFrame* frame);
 
  protected:
   friend class ChildProcess;
 
@@ skipping 45 matching lines @@
   // The OnChannelError() callback was invoked - the channel is dead, don't
   // attempt to communicate.
   bool on_channel_error_called_;
 
   MessageLoop* message_loop_;
 
   scoped_ptr<FileSystemDispatcher> file_system_dispatcher_;
 
   scoped_ptr<QuotaDispatcher> quota_dispatcher_;
 
+  scoped_refptr<content::ChildHistogramMessageFilter> histogram_message_filter_;
+
   DISALLOW_COPY_AND_ASSIGN(ChildThread);
 };
 
 #endif  // CONTENT_COMMON_CHILD_THREAD_H_