Make HWNDMessageHandler subclass WindowImpl.

ui/views/win/hwnd_message_handler_delegate.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_WIN_HWND_MESSAGE_HANDLER_DELEGATE_H_
 #define UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_DELEGATE_H_
 
 #include "ui/views/views_export.h"
 
 namespace gfx {
@@ skipping 19 matching lines @@
   virtual bool IsUsingCustomFrame() const = 0;
 
   virtual void SchedulePaint() = 0;
   virtual void EnableInactiveRendering() = 0;
   virtual bool IsInactiveRenderingDisabled() = 0;
 
   virtual bool CanResize() const = 0;
   virtual bool CanMaximize() const = 0;
   virtual bool CanActivate() const = 0;
 
+  virtual bool WidgetSizeIsClientSize() const = 0;
+
   // Returns true if the delegate has a focus saving mechanism that should be
   // used when the window is activated and deactivated.
   virtual bool CanSaveFocus() const = 0;
   virtual void SaveFocusOnDeactivate() = 0;
   virtual void RestoreFocusOnActivate() = 0;
   virtual void RestoreFocusOnEnable() = 0;
 
   // Returns true if the delegate represents a modal window.
   virtual bool IsModal() const = 0;
 
@@ skipping 122 matching lines @@
   // Called to forward a WM_NOTIFY message to the tooltip manager.
   virtual bool HandleTooltipNotify(int w_param,
                                    NMHDR* l_param,
                                    LRESULT* l_result) = 0;
 
   // Called to forward mouse events to the tooltip manager.
   virtual void HandleTooltipMouseMove(UINT message,
                                       WPARAM w_param,
                                       LPARAM l_param) = 0;
 
+  // Catch-all message handling and filtering. Called before
+  // HWNDMessageHandler's built-in handling, which may pre-empt some
+  // expectations in Views/Aura if messages are consumed. Returns true if the
+  // message was consumed by the delegate and should not be processed further
+  // by the HWNDMessageHandler. In this case, |result| is returned. |result| is
+  // not modified otherwise.
+  virtual bool PreHandleMSG(UINT message,
+                            WPARAM w_param,
+                            LPARAM l_param,
+                            LRESULT* result) = 0;
+
+  // Like PreHandleMSG, but called after HWNDMessageHandler's built-in handling
+  // has run and after DefWindowProc.
+  virtual void PostHandleMSG(UINT message,
+                             WPARAM w_param,
+                             LPARAM l_param) = 0;
+
   // This is provided for methods that need to call private methods on NWW.
   // TODO(beng): should be removed once HWNDMessageHandler is the WindowImpl.
   virtual NativeWidgetWin* AsNativeWidgetWin() = 0;
 
  protected:
   virtual ~HWNDMessageHandlerDelegate() {}
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_DELEGATE_H_