Remove --disable-core-animation flag

chrome/browser/ui/cocoa/fast_resize_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_UI_COCOA_FAST_RESIZE_VIEW_H_
 #define CHROME_BROWSER_UI_COCOA_FAST_RESIZE_VIEW_H_
 
 #import <Cocoa/Cocoa.h>
 
 @class CAShapeLayer;
 
-// A Cocoa view that supports an alternate resizing mode, normally used when
-// animations are in progress.  In normal resizing mode, subviews are sized to
-// completely fill this view's bounds.  In fast resizing mode, the subviews'
-// size is not changed and the subview is clipped to fit, if necessary.  Fast
-// resize mode is useful when animating a view that normally takes a significant
-// amount of time to relayout and redraw when its size is changed.
+// A Cocoa view originally created to support fast re-painting to white on
+// resize. This is done by CoreAnimation now, so this view remains only as the
+// first opaque ancestor of accelerated web contents views.
 @interface FastResizeView : NSView {
  @private
-  BOOL fastResizeMode_;
-
   // Whether the bottom corners should be rounded.
   BOOL roundedBottomCorners_;
 
   // Weak reference to the mask of the hosted layer.
   CAShapeLayer* layerMask_;
 }
 
-// Turns fast resizing mode on or off, which determines how this view resizes
-// its subviews.  Turning fast resizing mode off has the effect of immediately
-// resizing subviews to fit; callers do not need to explictly call |setFrame:|
-// to trigger a resize.
-- (void)setFastResizeMode:(BOOL)fastResizeMode;
-
 // Changes whether the bottom two corners are rounded.
 - (void)setRoundedBottomCorners:(BOOL)roundedBottomCorners;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_FAST_RESIZE_VIEW_H_