Revert 24314 - Modify the RenderThread to track the number of widgets

and "hidden widgets" which are running through that thread.

By knowing the if the widgets are all hidden, the thread
can accurately inform V8 when it is idle so that V8 can 
better cleanup unused memory when idle.

This time  if V8 has been killed for some reason, don't
call into it.

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/173379

TBR=mbelshe@google.com

Review URL: http://codereview.chromium.org/174458

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24339 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1 insertions, 25 deletions

diff --git a/chrome/renderer/render_thread.h b/chrome/renderer/render_thread.h
index 007bac4..5c22236 100644
--- a/chrome/renderer/render_thread.h
+++ b/chrome/renderer/render_thread.h
@@ -49,10 +49,6 @@ class RenderThreadBase {
 
   virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
   virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
-
-  // Called by a RenderWidget when it is hidden or restored.
-  virtual void WidgetHidden() = 0;
-  virtual void WidgetRestored() = 0;
 };
 
 // The RenderThread class represents a background thread where RenderView
@@ -83,20 +79,15 @@ class RenderThread : public RenderThreadBase,
   }
 
   virtual void AddRoute(int32 routing_id, IPC::Channel::Listener* listener) {
-    widget_count_++;
     return ChildThread::AddRoute(routing_id, listener);
   }
   virtual void RemoveRoute(int32 routing_id) {
-    widget_count_--;
     return ChildThread::RemoveRoute(routing_id);
   }
 
   virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter);
   virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter);
 
-  virtual void WidgetHidden();
-  virtual void WidgetRestored();
-
   VisitedLinkSlave* visited_link_slave() const {
     return visited_link_slave_.get();
   }
@@ -172,11 +163,8 @@ class RenderThread : public RenderThreadBase,
   // We initialize WebKit as late as possible.
   void EnsureWebKitInitialized();
 
-  // A task we invoke periodically to assist with idle cleanup.
-  void IdleHandler();
-
   // These objects live solely on the render thread.
-  scoped_ptr<ScopedRunnableMethodFactory<RenderThread> > task_factory_;
+  scoped_ptr<ScopedRunnableMethodFactory<RenderThread> > cache_stats_factory_;
   scoped_ptr<VisitedLinkSlave> visited_link_slave_;
   scoped_ptr<UserScriptSlave> user_script_slave_;
   scoped_ptr<RenderDnsMaster> dns_master_;
@@ -195,18 +183,6 @@ class RenderThread : public RenderThreadBase,
   // If true, then a GetPlugins call is allowed to rescan the disk.
   bool plugin_refresh_allowed_;
 
-  // Is there a pending task for doing CacheStats.
-  bool cache_stats_task_pending_;
-
-  // The count of RenderWidgets running through this thread.
-  int widget_count_;
-
-  // The count of hidden RenderWidgets running through this thread.
-  int hidden_widget_count_;
-
-  // The current value of the idle notification timer delay.
-  double idle_notification_delay_in_s_;
-
   DISALLOW_COPY_AND_ASSIGN(RenderThread);
 };