Get rid of the last RenderViewHostDelegate usage in chrome.

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
===================================================================
--- content/public/browser/web_contents.h	(revision 138434)
+++ content/public/browser/web_contents.h	(working copy)
@@ -310,6 +310,10 @@
   virtual void SetNewTabStartTime(const base::TimeTicks& time) = 0;
   virtual base::TimeTicks GetNewTabStartTime() const = 0;
 
+  // Tells the tab to close now. The tab will take care not to close until it's
+  // out of nested message loops.
+  virtual void Close() = 0;
+
   // Notification that tab closing has started.  This can be called multiple
   // times, subsequent calls are ignored.
   virtual void OnCloseStarted() = 0;
@@ -321,6 +325,11 @@
   // WebContentsDelegate.
   virtual void SystemDragEnded() = 0;
 
+  // Notification the user has made a gesture while focus was on the
+  // page. This is used to avoid uninitiated user downloads (aka carpet
+  // bombing), see DownloadRequestLimiter for details.
+  virtual void UserGestureDone() = 0;
+
   // Indicates if this tab was explicitly closed by the user (control-w, close
   // tab menu item...). This is false for actions that indirectly close the tab,
   // such as closing the window.  The setter is maintained by TabStripModel, and