[Mac Extensions Toolbar] Make the container's animationEndFrame always valid

chrome/browser/ui/cocoa/extensions/browser_actions_container_view.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_UI_COCOA_EXTENSIONS_BROWSER_ACTIONS_CONTAINER_VIEW_
 #define CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTIONS_CONTAINER_VIEW_
 
 #import <Cocoa/Cocoa.h>
 
 // Sent when a user-initiated drag to resize the container is initiated.
@@ skipping 14 matching lines @@
 // Key which is used to notify the translation with delta.
 extern NSString* const kTranslationWithDelta;
 
 // The view that encompasses the Browser Action buttons in the toolbar and
 // provides mechanisms for resizing.
 @interface BrowserActionsContainerView : NSView {
  @private
   // The frame encompasing the grippy used for resizing the container.
   NSRect grippyRect_;
 
-  // The end frame of the animation currently running for this container or
-  // NSZeroRect if none is in progress.
-  NSRect animationEndFrame_;
-
   // Used to cache the original position within the container that initiated the
   // drag.
   NSPoint initialDragPoint_;
 
   // Used to cache the previous x-pos of the frame rect for resizing purposes.
   CGFloat lastXPos_;
 
   // The maximum width of the container.
   CGFloat maxWidth_;
 
@@ skipping 23 matching lines @@
 
 // Resizes the container to the given ideal width, adjusting the |lastXPos_| so
 // that |resizeDeltaX| is accurate.
 - (void)resizeToWidth:(CGFloat)width animate:(BOOL)animate;
 
 // Returns the change in the x-pos of the frame rect during resizing. Meant to
 // be queried when a NSViewFrameDidChangeNotification is fired to determine
 // placement of surrounding elements.
 - (CGFloat)resizeDeltaX;
 
-@property(nonatomic, readonly) NSRect animationEndFrame;
+// Returns the frame of the container after the running animation has finished.
+// If no animation is running, returns the container's current frame.
+- (NSRect)animationEndFrame;
+
 @property(nonatomic) BOOL canDragLeft;
 @property(nonatomic) BOOL canDragRight;
 @property(nonatomic) BOOL grippyPinned;
 @property(nonatomic,getter=isResizable) BOOL resizable;
 @property(nonatomic) CGFloat maxWidth;
 @property(readonly, nonatomic) BOOL userIsResizing;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTIONS_CONTAINER_VIEW_