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

ui/views/widget/desktop_root_window_host_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/desktop_root_window_host_win.h"
 
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/desktop/desktop_activation_client.h"
@@ skipping 234 matching lines @@
 
 void DesktopRootWindowHostWin::SetWindowTitle(const string16& title) {
   message_handler_->SetTitle(title);
 }
 
 void DesktopRootWindowHostWin::ClearNativeFocus() {
   message_handler_->ClearNativeFocus();
 }
 
 Widget::MoveLoopResult DesktopRootWindowHostWin::RunMoveLoop(
-    const gfx::Point& drag_offset) {
+    const gfx::Vector2d& drag_offset) {
   return message_handler_->RunMoveLoop(drag_offset) ?
       Widget::MOVE_LOOP_SUCCESSFUL : Widget::MOVE_LOOP_CANCELED;
 }
 
 void DesktopRootWindowHostWin::EndMoveLoop() {
   message_handler_->EndMoveLoop();
 }
 
 void DesktopRootWindowHostWin::SetVisibilityChangedAnimationsEnabled(
     bool value) {
@@ skipping 472 matching lines @@
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostWin(native_widget_delegate,
                                       desktop_native_widget_aura,
                                       initial_bounds);
 }
 
 }  // namespace views