Add IPCs to check web copy/cut/paste for extensions with the appropriate permission bit.

chrome/browser/prerender/prerender_contents.h

Index: chrome/browser/prerender/prerender_contents.h
diff --git a/chrome/browser/prerender/prerender_contents.h b/chrome/browser/prerender/prerender_contents.h
index 06ea19492065fe3b696e48736bb5fb4433030d65..e8c946e3ba7a705e7408a05441927c4cc7c4691e 100644
--- a/chrome/browser/prerender/prerender_contents.h
+++ b/chrome/browser/prerender/prerender_contents.h
@@ -129,6 +129,8 @@ class PrerenderContents : public RenderViewHostDelegate,
                              int selected_item,
                              const std::vector<WebMenuItem>& items,
                              bool right_aligned) {}
+  virtual bool IsCopyCutEnabled() { return false; }
+  virtual bool IsPasteEnabled() { return false; }
   virtual void StartDragging(const WebDropData& drop_data,
                              WebKit::WebDragOperationsMask allowed_operations,
                              const SkBitmap& image,