Makes it so child views of menuitemview can be traversed with the

views/controls/button/custom_button.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "views/controls/button/custom_button.h"
 
 #include "app/throb_animation.h"
 #include "base/keyboard_codes.h"
 
 namespace views {
@@ skipping 56 matching lines @@
   return (state_ != BS_DISABLED) && View::IsFocusable();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // CustomButton, protected:
 
 CustomButton::CustomButton(ButtonListener* listener)
     : Button(listener),
       state_(BS_NORMAL),
       animate_on_state_change_(true),
-      triggerable_event_flags_(MouseEvent::EF_LEFT_BUTTON_DOWN) {
+      triggerable_event_flags_(MouseEvent::EF_LEFT_BUTTON_DOWN),
+      request_focus_on_press_(true) {
   hover_animation_.reset(new ThrobAnimation(this));
   hover_animation_->SetSlideDuration(kHoverFadeDurationMs);
 }
 
 bool CustomButton::IsTriggerableEvent(const MouseEvent& e) {
   return (triggerable_event_flags_ & e.GetFlags()) != 0;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // CustomButton, View overrides (protected):
 
 bool CustomButton::AcceleratorPressed(const Accelerator& accelerator) {
   if (enabled_) {
     SetState(BS_NORMAL);
     KeyEvent key_event(Event::ET_KEY_RELEASED, accelerator.GetKeyCode(),
                        accelerator.modifiers(), 0, 0);
     NotifyClick(key_event);
     return true;
   }
   return false;
 }
 
 bool CustomButton::OnMousePressed(const MouseEvent& e) {
   if (state_ != BS_DISABLED) {
     if (ShouldEnterPushedState(e) && HitTest(e.location()))
       SetState(BS_PUSHED);
-    RequestFocus();
+    if (request_focus_on_press_)
+      RequestFocus();
   }
   return true;
 }
 
 bool CustomButton::OnMouseDragged(const MouseEvent& e) {
   if (state_ != BS_DISABLED) {
     if (!HitTest(e.location()))
       SetState(BS_NORMAL);
     else if (ShouldEnterPushedState(e))
       SetState(BS_PUSHED);
@@ skipping 132 matching lines @@
 
 bool CustomButton::IsHighlighted() const {
   return state_ == BS_HOT;
 }
 
 bool CustomButton::IsPushed() const {
   return state_ == BS_PUSHED;
 }
 
 }  // namespace views