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

ui/views/widget/widget.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/widget.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "ui/base/events/event.h"
@@ skipping 465 matching lines @@
     work_area.Inset(10, 10, 10, 10);
     work_area.AdjustToFit(bounds);
     SetBounds(work_area);
   }
 }
 
 void Widget::SetVisibilityChangedAnimationsEnabled(bool value) {
   native_widget_->SetVisibilityChangedAnimationsEnabled(value);
 }
 
-Widget::MoveLoopResult Widget::RunMoveLoop(const gfx::Point& drag_offset) {
+Widget::MoveLoopResult Widget::RunMoveLoop(const gfx::Vector2d& drag_offset) {
   return native_widget_->RunMoveLoop(drag_offset);
 }
 
 void Widget::EndMoveLoop() {
   native_widget_->EndMoveLoop();
 }
 
 void Widget::StackAboveWidget(Widget* widget) {
   native_widget_->StackAbove(widget->GetNativeView());
 }
@@ skipping 857 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views