Additional fixes for prerender/instant + browsing history.

content/renderer/render_view.h

Index: content/renderer/render_view.h
diff --git a/content/renderer/render_view.h b/content/renderer/render_view.h
index 3b95206a9ffc64921ddb27d7e2cb94a06b704e4d..5b5cd44f06ff75d49d94847cf9d3d35d777d15aa 100644
--- a/content/renderer/render_view.h
+++ b/content/renderer/render_view.h
@@ -661,6 +661,7 @@ class RenderView : public RenderWidget,
 #if defined(OS_MACOSX)
   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, MacTestCmdUp);
 #endif
+  FRIEND_TEST_ALL_PREFIXES(RenderViewTest, SetHistoryLengthAndPrune);
 
   typedef std::map<GURL, double> HostZoomLevels;
 
@@ -826,6 +827,7 @@ class RenderView : public RenderWidget,
   void OnSetBackground(const SkBitmap& background);
   void OnSetWebUIProperty(const std::string& name, const std::string& value);
   void OnSetEditCommandsForNextKeyEvent(const EditCommands& edit_commands);
+  void OnSetHistoryLengthAndPrune(int history_length, int32 minimum_page_id);
   void OnSetInitialFocus(bool reverse);
 #if defined(OS_MACOSX)
   void OnSetInLiveResize(bool in_live_resize);
@@ -847,7 +849,6 @@ class RenderView : public RenderWidget,
   void OnUpdateTargetURLAck();
   void OnUpdateWebPreferences(const WebPreferences& prefs);
   void OnUpdateRemoteAccessClientFirewallTraversal(const std::string& policy);
-  void OnSetHistoryLengthAndClear(int history_length);
 
 #if defined(OS_MACOSX)
   void OnWindowFrameChanged(const gfx::Rect& window_frame,