Improves tab overview.

chrome/browser/views/tabs/tab_overview_grid.cc

 // Copyright (c) 2009 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/views/tabs/tab_overview_grid.h"
 
 #include "chrome/browser/views/tabs/tab_overview_cell.h"
 #include "chrome/browser/views/tabs/tab_overview_controller.h"
 #include "chrome/browser/views/tabs/tab_overview_drag_controller.h"
 #include "views/screen.h"
 
 TabOverviewGrid::TabOverviewGrid(TabOverviewController* controller)
     : controller_(controller) {
 }
 
 TabOverviewGrid::~TabOverviewGrid() {
 }
 
 bool TabOverviewGrid::modifying_model() const {
   return drag_controller_.get() && drag_controller_->modifying_model();
 }
 
 TabOverviewCell* TabOverviewGrid::GetTabOverviewCellAt(int index) {
   return static_cast<TabOverviewCell*>(GetChildViewAt(index));
 }
 
+TabOverviewDragController* TabOverviewGrid::drag_controller() const {
+  return drag_controller_.get();
+}
+
 void TabOverviewGrid::CancelDrag() {
   drag_controller_.reset(NULL);
 }
 
 void TabOverviewGrid::UpdateDragController() {
   if (drag_controller_.get()) {
     gfx::Point mouse_loc = views::Screen::GetCursorScreenPoint();
     ConvertPointToView(NULL, this, &mouse_loc);
     drag_controller_->Drag(mouse_loc);
   }
@@ skipping 21 matching lines @@
   drag_controller_->Drag(event.location());
   return true;
 }
 
 void TabOverviewGrid::OnMouseReleased(const views::MouseEvent& event,
                                       bool canceled) {
   if (!drag_controller_.get())
     return;
 
   if (canceled)
-    drag_controller_->RevertDrag();
+    drag_controller_->RevertDrag(false);
   else
     drag_controller_->CommitDrag(event.location());
   drag_controller_.reset(NULL);
 }
 
 void TabOverviewGrid::AnimationEnded(const Animation* animation) {
   Grid::AnimationEnded(animation);
   controller_->GridAnimationEnded();
 }
 
 void TabOverviewGrid::AnimationProgressed(const Animation* animation) {
   Grid::AnimationProgressed(animation);
   controller_->GridAnimationProgressed();
 }
 
 void TabOverviewGrid::AnimationCanceled(const Animation* animation) {
   Grid::AnimationCanceled(animation);
   controller_->GridAnimationCanceled();
 }