Fix a bunch of clang warnings/errors.

chrome/browser/cocoa/tabpose_window.h

 // Copyright (c) 2010 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_TABPOSE_WINDOW_H_
 #define CHROME_BROWSER_COCOA_TABPOSE_WINDOW_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 
@@ skipping 41 matching lines @@
   CALayer* selectionHighlight_;  // weak
 
   // Colors used by the layers.
   scoped_cftyperef<CGColorRef> gray_;
   scoped_cftyperef<CGColorRef> darkBlue_;
 
   TabStripModel* tabStripModel_;  // weak
 
   // Stores all preview layers. The order in here matches the order in
   // the tabstrip model.
-  scoped_nsobject<NSArray> allThumbnailLayers_;
+  scoped_nsobject<NSMutableArray> allThumbnailLayers_;
 
-  scoped_nsobject<NSArray> allFaviconLayers_;
-  scoped_nsobject<NSArray> allTitleLayers_;
+  scoped_nsobject<NSMutableArray> allFaviconLayers_;
+  scoped_nsobject<NSMutableArray> allTitleLayers_;
 
   // Manages the state of all layers.
   scoped_ptr<tabpose::TileSet> tileSet_;
 
   // The rectangle of the window that contains all layers. This is the
   // rectangle occupied by |bgLayer_|.
   NSRect containingRect_;
 
   // Informs us of added/removed/updated tabs.
   scoped_ptr<TabStripModelObserverBridge> tabStripModelObserverBridge_;
 }
 
 // Shows a TabposeWindow on top of |parent|, with |rect| being the active area.
 // If |slomo| is YES, then the appearance animation is shown in slow motion.
 // The window blocks all keyboard and mouse events and releases itself when
 // closed.
 + (id)openTabposeFor:(NSWindow*)parent
                 rect:(NSRect)rect
                slomo:(BOOL)slomo
        tabStripModel:(TabStripModel*)tabStripModel;
 @end
 
 @interface TabposeWindow (TestingAPI)
 - (void)selectTileAtIndexWithoutAnimation:(int)newIndex;
 - (NSUInteger)thumbnailLayerCount;
 - (int)selectedIndex;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_TABPOSE_WINDOW_H_