Fix bug where transient pages would miss events dispatched while it was

chrome/renderer/extensions/extension_helper.h

Index: chrome/renderer/extensions/extension_helper.h
diff --git a/chrome/renderer/extensions/extension_helper.h b/chrome/renderer/extensions/extension_helper.h
index 0a0b949aa981b9f00e9cbf5c38f2d7899545b3f5..a1ed3edffa7b4f34a6b2b960569e04e1883c99e6 100644
--- a/chrome/renderer/extensions/extension_helper.h
+++ b/chrome/renderer/extensions/extension_helper.h
@@ -36,6 +36,18 @@ class ExtensionHelper
     : public content::RenderViewObserver,
       public content::RenderViewObserverTracker<ExtensionHelper> {
  public:
+  // Returns a list of extension RenderViews that match the given filter
+  // criteria. If |browser_window_id| is not extension_misc::kUnknownWindowId,
+  // the list is restricted to views in that browser window.
+  static std::vector<content::RenderView*> GetExtensionViews(
+      const std::string& extension_id,
+      int browser_window_id,
+      content::ViewType view_type);
+
+  // Returns the given extension's background page, or NULL if none.
+  static content::RenderView* GetBackgroundPage(
+      const std::string& extension_id);
+
   ExtensionHelper(content::RenderView* render_view,
                   ExtensionDispatcher* extension_dispatcher);
   virtual ~ExtensionHelper();