Add infrastructure for Chrome Actions

chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/extensions/browser_actions_controller.h"
 
 #include <cmath>
 #include <string>
 
 #include "base/strings/sys_string_conversions.h"
@@ skipping 681 matching lines @@
   NSUInteger index = 0;
   for (ExtensionList::const_iterator iter =
            toolbarModel_->toolbar_items().begin();
        iter != toolbarModel_->toolbar_items().end(); ++iter) {
     BrowserActionButton* button = [self buttonForExtension:(iter->get())];
     CGFloat intersectionWidth =
         NSWidth(NSIntersectionRect(draggedButtonFrame, [button frame]));
 
     if (intersectionWidth > dragThreshold && button != draggedButton &&
         ![button isAnimating] && index < [self visibleButtonCount]) {
-      toolbarModel_->MoveExtensionIcon([draggedButton extension], index);
+      toolbarModel_->MoveExtensionIcon([draggedButton extension]->id(), index);
       [self positionActionButtonsAndAnimate:YES];
       return;
     }
     ++index;
   }
 }
 
 - (void)actionButtonDragFinished:(NSNotification*)notification {
   [self showChevronIfNecessaryInFrame:[containerView_ frame] animate:YES];
   [self positionActionButtonsAndAnimate:YES];
@@ skipping 145 matching lines @@
   const extensions::ExtensionList& toolbar_items =
       toolbarModel_->toolbar_items();
   if (index < toolbar_items.size()) {
     const Extension* extension = toolbar_items[index].get();
     return [buttons_ objectForKey:base::SysUTF8ToNSString(extension->id())];
   }
   return nil;
 }
 
 @end