Reland Propagate OnNativeWidgetMove to delegate/observers, etc.

ui/views/widget/native_widget_win.cc

 // 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.
 
 #include "ui/views/widget/native_widget_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include <algorithm>
@@ skipping 1595 matching lines @@
     // side-effects (ex/ stifling non-client mouse releases).
     DefWindowProcWithRedrawLock(message, w_param, l_param);
     handled = true;
   }
 
   SetMsgHandled(handled);
   return 0;
 }
 
 void NativeWidgetWin::OnMove(const CPoint& point) {
-  // TODO(beng): move to Widget.
-  GetWidget()->widget_delegate()->OnWidgetMove();
+  delegate_->OnNativeWidgetMove();
   SetMsgHandled(FALSE);
 }
 
 void NativeWidgetWin::OnMoving(UINT param, const LPRECT new_bounds) {
-  // TODO(beng): move to Widget.
-  GetWidget()->widget_delegate()->OnWidgetMove();
+  delegate_->OnNativeWidgetMove();
 }
 
 LRESULT NativeWidgetWin::OnNCActivate(BOOL active) {
   if (delegate_->CanActivate())
     delegate_->OnNativeWidgetActivationChanged(!!active);
 
   if (!GetWidget()->non_client_view()) {
     SetMsgHandled(FALSE);
     return 0;
   }
@@ skipping 1014 matching lines @@
   return (GetKeyState(VK_LBUTTON) & 0x80) ||
     (GetKeyState(VK_RBUTTON) & 0x80) ||
     (GetKeyState(VK_MBUTTON) & 0x80) ||
     (GetKeyState(VK_XBUTTON1) & 0x80) ||
     (GetKeyState(VK_XBUTTON2) & 0x80);
 }
 
 }  // namespace internal
 
 }  // namespace views