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

chrome/browser/notifications/balloon_collection_impl.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 "chrome/browser/notifications/balloon_collection_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "chrome/browser/notifications/balloon.h"
@@ skipping 119 matching lines @@
   PositionBalloons(true);
 }
 
 void BalloonCollectionImpl::OnBalloonClosed(Balloon* source) {
 #if USE_OFFSETS
   // We want to free the balloon when finished.
   const Balloons& balloons = base_.balloons();
 
   Balloons::const_iterator it = balloons.begin();
   if (layout_.RequiresOffsets()) {
-    gfx::Point offset;
+    gfx::Vector2d offset;
     bool apply_offset = false;
     while (it != balloons.end()) {
       if (*it == source) {
         ++it;
         if (it != balloons.end()) {
           apply_offset = true;
           offset.set_y((source)->offset().y() - (*it)->offset().y() +
               (*it)->content_size().height() - source->content_size().height());
         }
       } else {
@@ skipping 91 matching lines @@
 void BalloonCollectionImpl::CancelOffsets() {
   reposition_factory_.InvalidateWeakPtrs();
 
   // Unhook from listening to all UI events.
   RemoveMessageLoopObserver();
 
   const Balloons& balloons = base_.balloons();
   for (Balloons::const_iterator it = balloons.begin();
        it != balloons.end();
        ++it)
-    (*it)->set_offset(gfx::Point(0, 0));
+    (*it)->set_offset(gfx::Vector2d());
 
   PositionBalloons(true);
 }
 
 void BalloonCollectionImpl::HandleMouseMoveEvent() {
   if (!IsCursorInBalloonCollection()) {
     // Mouse has left the region.  Schedule a reposition after
     // a short delay.
     if (!reposition_factory_.HasWeakPtrs()) {
       MessageLoop::current()->PostDelayedTask(
@@ skipping 207 matching lines @@
       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().work_area();
 #endif
   if (work_area_ != new_work_area) {
     work_area_.SetRect(new_work_area.x(), new_work_area.y(),
                        new_work_area.width(), new_work_area.height());
     changed = true;
   }
 
   return changed;
 }