Add infrastructure for Chrome Actions

chrome/browser/ui/views/toolbar/browser_actions_container.h

Index: chrome/browser/ui/views/toolbar/browser_actions_container.h
diff --git a/chrome/browser/ui/views/toolbar/browser_actions_container.h b/chrome/browser/ui/views/toolbar/browser_actions_container.h
index 17907b9596a7992331c6f9606ef87f0fc7a13ce0..5964bb8624159ef12dad38a967ba3d8493c50a25 100644
--- a/chrome/browser/ui/views/toolbar/browser_actions_container.h
+++ b/chrome/browser/ui/views/toolbar/browser_actions_container.h
@@ -164,6 +164,9 @@ class BrowserActionsContainer
     return browser_action_views_[index];
   }
 
+  // Returns the extension of the view of the given |index|.
+  const extensions::Extension* GetExtensionAt(size_t index) const;
+
   // Returns the BrowserActionView* associated with the given |extension|, or
   // NULL if none exists.
   BrowserActionView* GetViewForExtension(
@@ -238,8 +241,8 @@ class BrowserActionsContainer
   virtual views::MenuButton* GetOverflowReferenceView() override;
   virtual void SetPopupOwner(BrowserActionView* popup_owner) override;
   virtual void HideActivePopup() override;
-  virtual BrowserActionView* GetMainViewForExtension(
-      const extensions::Extension* extension) override;
+  virtual BrowserActionView* GetMainViewForAction(
+      BrowserActionView* view) override;
 
   // Overridden from extension::ExtensionKeybindingRegistry::Delegate:
   virtual extensions::ActiveTabPermissionGranter*