Respect Spaces when dragging tabs on OS X

chrome/browser/cocoa/tab_view.h

 // 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.
 
 #ifndef CHROME_BROWSER_COCOA_TAB_VIEW_H_
 #define CHROME_BROWSER_COCOA_TAB_VIEW_H_
 
 #import <Cocoa/Cocoa.h>
+#include <ApplicationServices/ApplicationServices.h>
+
+#include <map>
 
 #include "base/scoped_nsobject.h"
 #import "chrome/browser/cocoa/background_gradient_view.h"
 #import "chrome/browser/cocoa/hover_close_button.h"
 
 namespace tabs {
 
 // Nomenclature:
 // Tabs _glow_ under two different circumstances, when they are _hovered_ (by
 // the mouse) and when they are _alerted_ (to show that the tab's title has
@@ skipping 55 matching lines @@
   // TODO(alcor): these references may need to be strong to avoid crashes
   // due to JS closing windows
   TabWindowController* sourceController_;  // weak. controller starting the drag
   NSWindow* sourceWindow_;  // weak. The window starting the drag
   NSRect sourceWindowFrame_;
   NSRect sourceTabFrame_;
 
   TabWindowController* draggedController_;  // weak. Controller being dragged.
   NSWindow* dragWindow_;  // weak. The window being dragged
   NSWindow* dragOverlay_;  // weak. The overlay being dragged
+  // Cache workspace IDs per-drag because computing them on 10.5 with
+  // CGWindowListCreateDescriptionFromArray is expensive.
+  // resetDragControllers clears this cache.
+  //
+  // TODO(davidben): When 10.5 becomes unsupported, remove this.
+  std::map<CGWindowID, int> workspaceIDCache_;
 
   TabWindowController* targetController_;  // weak. Controller being targeted
   NSCellStateValue state_;
 }
 
 @property(assign, nonatomic) NSCellStateValue state;
 @property(assign, nonatomic) CGFloat hoverAlpha;
 @property(assign, nonatomic) CGFloat alertAlpha;
 
 // Determines if the tab is in the process of animating closed. It may still
@@ skipping 17 matching lines @@
 
 // The TabController |controller_| is not the only owner of this view. If the
 // controller is released before this view, then we could be hanging onto a
 // garbage pointer. To prevent this, the TabController uses this interface to
 // clear the |controller_| pointer when it is dying.
 @interface TabView (TabControllerInterface)
 - (void)setController:(TabController*)controller;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_TAB_VIEW_H_