Clean up a few more unused globals.

ui/app_list/cocoa/item_drag_controller.mm

 // Copyright 2013 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 "ui/app_list/cocoa/item_drag_controller.h"
 
 #include "base/logging.h"
 #import "ui/app_list/cocoa/apps_grid_view_item.h"
 #include "ui/base/cocoa/window_size_constants.h"
 
-namespace {
-
 // Scale to transform the grid cell when a drag starts. Note that 1.5 ensures
 // that integers are used for the layer bounds when the grid cell dimensions
 // are even.
 const CGFloat kDraggingIconScale = 1.5;
 
 const NSTimeInterval kAnimationDuration = 0.2;
-NSString* const kGrowAnimationKey = @"growAnimation";
 
-}  // namespace
 
 @interface ItemDragController ()
 
 - (void)animateTransformFrom:(CATransform3D)fromValue
                  useDelegate:(BOOL)useDelegate;
 
 - (void)clearAnimations;
 
 @end
 
@@ skipping 147 matching lines @@
   if (!finished)
     return;
 
   DCHECK(shrinking_);
   [self clearAnimations];
   [dragLayer_ setContents:nil];
   [[self view] setHidden:YES];
 }
 
 @end