Get rid of a bunch of view_messages.h includes from chrome by making the TabContentsObserver inte...

chrome/browser/prerender/prerender_contents.h

Index: chrome/browser/prerender/prerender_contents.h
===================================================================
--- chrome/browser/prerender/prerender_contents.h	(revision 110851)
+++ chrome/browser/prerender/prerender_contents.h	(working copy)
@@ -24,7 +24,6 @@
 class TabContents;
 class TabContentsWrapper;
 struct FaviconURL;
-struct ViewHostMsg_FrameNavigate_Params;
 
 namespace base {
 class ProcessMetrics;
@@ -94,10 +93,6 @@
 
   RenderViewHost* render_view_host_mutable();
   const RenderViewHost* render_view_host() const;
-
-  ViewHostMsg_FrameNavigate_Params* navigate_params() {
-    return navigate_params_.get();
-  }
   string16 title() const { return title_; }
   int32 page_id() const { return page_id_; }
   GURL icon_url() const { return icon_url_; }
@@ -243,9 +238,6 @@
   // The referrer.
   GURL referrer_;
 
-  // The NavigationParameters of the finished navigation.
-  scoped_ptr<ViewHostMsg_FrameNavigate_Params> navigate_params_;
-
   // The profile being used
   Profile* profile_;