Add Vector2d classes that represent offsets, instead of using Point.

ui/views/win/hwnd_message_handler.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/win/hwnd_message_handler.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include "base/bind.h"
@@ skipping 650 matching lines @@
 }
 
 bool HWNDMessageHandler::IsMinimized() const {
   return !!::IsIconic(hwnd());
 }
 
 bool HWNDMessageHandler::IsMaximized() const {
   return !!::IsZoomed(hwnd());
 }
 
-bool HWNDMessageHandler::RunMoveLoop(const gfx::Point& drag_offset) {
+bool HWNDMessageHandler::RunMoveLoop(const gfx::Vector2d& drag_offset) {
   ReleaseCapture();
   MoveLoopMouseWatcher watcher(this);
   SendMessage(hwnd(), WM_SYSCOMMAND, SC_MOVE | 0x0002, GetMessagePos());
   // Windows doesn't appear to offer a way to determine whether the user
   // canceled the move or not. We assume if the user released the mouse it was
   // successful.
   return watcher.got_mouse_up();
 }
 
 void HWNDMessageHandler::EndMoveLoop() {
@@ skipping 1392 matching lines @@
     DwmExtendFrameIntoClientArea(hwnd(), &m);
   }
   if (window_pos->flags & SWP_SHOWWINDOW)
     delegate_->HandleVisibilityChanged(true);
   else if (window_pos->flags & SWP_HIDEWINDOW)
     delegate_->HandleVisibilityChanged(false);
   SetMsgHandled(FALSE);
 }
 
 }  // namespace views