[Mac] Prevent extension icon animation when window not visible.

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 <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 640 matching lines @@
     [button removeFromSuperview];
     [button onRemoved];
   }
   [buttons_ removeAllObjects];
 }
 
 - (void)resizeContainerToWidth:(CGFloat)width {
   // Cocoa goes a little crazy if we try and change animations while adjusting
   // child frames (i.e., the buttons). If the toolbar is already animating,
   // just jump to the new frame. (This typically only happens if someone is
-  // "spamming" a button to add/remove an action.)
+  // "spamming" a button to add/remove an action.) If the window isn't visible
+  // (for example it's in the process of being created), don't bother animating.
   BOOL animate = !toolbarActionsBar_->suppress_animation() &&
-      ![containerView_ isAnimating];
+      ![containerView_ isAnimating] && [[containerView_ window] isVisible];
   [self updateContainerVisibility];
   [containerView_ resizeToWidth:width
                         animate:animate];
   NSRect frame = animate ? [containerView_ animationEndFrame] :
                            [containerView_ frame];
 
   [self showChevronIfNecessaryInFrame:frame];
 
   [containerView_ setNeedsDisplay:YES];
 
@@ skipping 398 matching lines @@
 }
 
 #pragma mark -
 #pragma mark Testing Methods
 
 - (BrowserActionButton*)buttonWithIndex:(NSUInteger)index {
   return index < [buttons_ count] ? [buttons_ objectAtIndex:index] : nil;
 }
 
 @end