Keep reference view pressed while extension actions have a popup

ui/views/controls/button/custom_button.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/animation/animation_delegate.h"
@@ skipping 80 matching lines @@
 
   // Takes ownership of the delegate.
   void set_state_changed_delegate(CustomButtonStateChangedDelegate* delegate) {
     state_changed_delegate_.reset(delegate);
   }
 
  protected:
   // Construct the Button with a Listener. See comment for Button's ctor.
   explicit CustomButton(ButtonListener* listener);
 
+  // Returns whether or not the button should respond to mouse events. This
+  // could be false if e.g. the button is showing a menu and wants to remain
+  // pressed.
+  // This is checked for mouse movement (OnMouse[Entered|Exited|Moved]) only;
+  // other mouse events (like OnMousePressed) are still processed normally.
+  // Defaults to true.
+  virtual bool ShouldRespondToMouseMovement();
+
   // Invoked from SetState() when SetState() is passed a value that differs from
   // the current state. CustomButton's implementation of StateChanged() does
   // nothing; this method is provided for subclasses that wish to do something
   // on state changes.
   virtual void StateChanged();
 
   // Returns true if the event is one that can trigger notifying the listener.
   // This implementation returns true if the left mouse button is down.
   virtual bool IsTriggerableEvent(const ui::Event& event);
 
@@ skipping 40 matching lines @@
 protected:
   CustomButtonStateChangedDelegate() {}
 
 private:
   DISALLOW_COPY_AND_ASSIGN(CustomButtonStateChangedDelegate);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_