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

chrome/browser/notifications/balloon_host.h

Index: chrome/browser/notifications/balloon_host.h
diff --git a/chrome/browser/notifications/balloon_host.h b/chrome/browser/notifications/balloon_host.h
index afb3eb1faeb312f899aa6bbffc0fc623594e4bb5..84691b1d5e44c2a1c60246f5769841f012da78c5 100644
--- a/chrome/browser/notifications/balloon_host.h
+++ b/chrome/browser/notifications/balloon_host.h
@@ -89,8 +89,8 @@ class BalloonHost : public RenderViewHostDelegate,
                              int selected_item,
                              const std::vector<WebMenuItem>& items,
                              bool right_aligned) {}
-  virtual void StartDragging(const WebDropData& drop_data,
-                             WebKit::WebDragOperationsMask allowed_ops) {}
+  virtual bool IsCopyCutEnabled() { return false; }
+  virtual bool IsPasteEnabled() { return false; }
   virtual void StartDragging(const WebDropData&,
                              WebKit::WebDragOperationsMask,
                              const SkBitmap&,