Add IncrementWorkerRefCount() and DecrementWorkerRefCount() to RenderProcessHostImpl.

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index d2fbe9a5599def233956b3e7a109e8ed8db016d1..5bf4d3ba985d9ca6a2d4ffbb282139fd25b3fe02 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -129,6 +129,8 @@ class CONTENT_EXPORT RenderProcessHostImpl
 #endif
   virtual void ResumeDeferredNavigation(const GlobalRequestID& request_id)
       OVERRIDE;
+  virtual void SetExternalClientStatus(
+      bool has_external_worker_client) OVERRIDE;
 
   // IPC::Sender via RenderProcessHost.
   virtual bool Send(IPC::Message* msg) OVERRIDE;
@@ -415,6 +417,8 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // Message filter and dispatcher for screen orientation.
   ScreenOrientationDispatcherHost* screen_orientation_dispatcher_host_;
 
+  bool has_external_worker_client_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };