Implement keyboard access between bookmarks and toolbar.

views/controls/button/menu_button.h

Index: views/controls/button/menu_button.h
diff --git a/views/controls/button/menu_button.h b/views/controls/button/menu_button.h
index 1f5f8e8dd90c5a19c22d82bb3752f3d544c40ae4..44a93c61eed72b535c710169b32b00e1b5ee598d 100644
--- a/views/controls/button/menu_button.h
+++ b/views/controls/button/menu_button.h
@@ -5,6 +5,8 @@
 #ifndef VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
 #define VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
 
+#include <string>
+
 #include "app/gfx/font.h"
 #include "base/time.h"
 #include "views/background.h"
@@ -25,6 +27,9 @@ class ViewMenuDelegate;
 ////////////////////////////////////////////////////////////////////////////////
 class MenuButton : public TextButton {
  public:
+  // The menu button's class name.
+  static const char kViewClassName[];
+
   //
   // Create a Button
   MenuButton(ButtonListener* listener,
@@ -56,6 +61,9 @@ class MenuButton : public TextButton {
   virtual bool GetAccessibleRole(AccessibilityTypes::Role* role);
   virtual bool GetAccessibleState(AccessibilityTypes::State* state);
 
+  // Returns views/MenuButton.
+  virtual std::string GetClassName() const;
+
  protected:
   // True if the menu is currently visible.
   bool menu_visible_;