Add a new constructor to KeyEvent.

views/focus/accelerator_handler.h

 // Copyright (c) 2006-2008 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 VIEWS_FOCUS_ACCELERATOR_HANDLER_H_
 #define VIEWS_FOCUS_ACCELERATOR_HANDLER_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 17 matching lines @@
 // Keep a list of touch devices so that it is possible to determine if a pointer
 // event is a touch-event or a mouse-event.
 void SetTouchDeviceList(std::vector<unsigned int>& devices);
 #endif  // HAVE_XINPUT2
 #endif  // TOUCH_UI
 
 // This class delegates the key messages to the associated FocusManager class
 // for the window that is receiving these messages for accelerator processing.
 class AcceleratorHandler : public MessageLoopForUI::Dispatcher {
  public:
-   AcceleratorHandler();
+  AcceleratorHandler();
+
+#if defined(OS_WIN)
+  // Returns the message currently being processed.
+  // Note that this may not work for message loops run by the OS.
+  static const MSG& current_message() { return current_messages_->back(); }
+#endif
+
   // Dispatcher method. This returns true if an accelerator was processed by the
   // focus manager
 #if defined(OS_WIN)
   virtual bool Dispatch(const MSG& msg);
 #else
   virtual bool Dispatch(GdkEvent* event);
 #if defined(TOUCH_UI)
   virtual MessagePumpGlibXDispatcher::DispatchStatus Dispatch(XEvent* xev);
 #endif
 #endif
 
  private:
 #if defined(OS_WIN)
   // The keys currently pressed and consumed by the FocusManager.
   std::set<WPARAM> pressed_keys_;
+
+  // A stack of current messages, to handle message loop nesting.
+  static std::vector<MSG>* current_messages_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratorHandler);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_FOCUS_ACCELERATOR_HANDLER_H_