Implement keyboard access between bookmarks and toolbar.

views/controls/button/menu_button.cc

Index: views/controls/button/menu_button.cc
diff --git a/views/controls/button/menu_button.cc b/views/controls/button/menu_button.cc
index 7fb81cb727c1c1d213d8ec7a40ae068c41a79fc2..eb9d952590c90b5e4e0cbbb3f5b2ba73ca963299 100644
--- a/views/controls/button/menu_button.cc
+++ b/views/controls/button/menu_button.cc
@@ -35,6 +35,9 @@ static const SkBitmap* kMenuMarker = NULL;
 static const int kMenuMarkerPaddingLeft = 3;
 static const int kMenuMarkerPaddingRight = -1;
 
+// static
+const char MenuButton::kViewClassName[] = "views/MenuButton";
+
 ////////////////////////////////////////////////////////////////////////////////
 //
 // MenuButton - constructors, destructors, initialization
@@ -252,4 +255,8 @@ bool MenuButton::GetAccessibleState(AccessibilityTypes::State* state) {
   return true;
 }
 
+std::string MenuButton::GetClassName() const {
+  return kViewClassName;
+}
+
 }  // namespace views