Add IncrementWorkerRefCount() and DecrementWorkerRefCount() to RenderProcessHostImpl.

content/browser/renderer_host/render_process_host_impl.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_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <string>
@@ skipping 208 matching lines @@
 #endif
 
   MessagePortMessageFilter* message_port_message_filter() const {
     return message_port_message_filter_;
   }
 
   void SetIsGuestForTesting(bool is_guest) {
     is_guest_ = is_guest;
   }
 
+  // Called when the existence of the other renderer process which is connected
+  // to the Worker in this renderer process has changed.
+  // It is only called when "enable-embedded-shared-worker" flag is set.
+  void IncrementWorkerRefCount();
+  void DecrementWorkerRefCount();
+
  protected:
   // A proxy for our IPC::Channel that lives on the IO thread (see
   // browser_process.h)
   scoped_ptr<IPC::ChannelProxy> channel_;
 
   // True if fast shutdown has been performed on this RPH.
   bool fast_shutdown_started_;
 
   // True if we've posted a DeleteTask and will be deleted soon.
   bool deleting_soon_;
@@ skipping 169 matching lines @@
 #if defined(ENABLE_WEBRTC)
   base::Callback<void(const std::string&)> webrtc_log_message_callback_;
 #endif
 
   // Lives on the browser's ChildThread.
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   // Message filter and dispatcher for screen orientation.
   ScreenOrientationDispatcherHost* screen_orientation_dispatcher_host_;
 
+  int worker_ref_count_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_