Implement initial chrome.browserAction.openPopup API.

chrome/browser/ui/views/browser_actions_container.h

Index: chrome/browser/ui/views/browser_actions_container.h
diff --git a/chrome/browser/ui/views/browser_actions_container.h b/chrome/browser/ui/views/browser_actions_container.h
index 9e3fc949c58b67c126b73e3f558ee3d9f8a75b6f..ff416a6b1e145599fb42c2f1ec429dc55607053f 100644
--- a/chrome/browser/ui/views/browser_actions_container.h
+++ b/chrome/browser/ui/views/browser_actions_container.h
@@ -259,6 +259,8 @@ class BrowserActionsContainer
       const extensions::Extension* extension) OVERRIDE;
   virtual void BrowserActionMoved(const extensions::Extension* extension,
                                   int index) OVERRIDE;
+  virtual void BrowserActionShowPopup(
+      const extensions::Extension* extension) OVERRIDE;
   virtual void ModelLoaded() OVERRIDE;
 
   void LoadImages();