[Mac] Add support for growing or shrinking the window during animations....

chrome/browser/cocoa/toolbar_controller.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_COCOA_TOOLBAR_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_TOOLBAR_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_ptr.h"
@@ skipping 116 matching lines @@
 
 // Allow turning off the toolbar (but we keep the location bar
 // around).  This changes the behavior of other methods, like
 // [self view].
 - (void)setHasToolbar:(BOOL)toolbar;
 
 // The bookmark bubble (when you click the star) needs to know where to go.
 // Somewhere near the star button seems like a good start.
 - (NSRect)starButtonInWindowCoordinates;
 
-// Chop off the bottom of the toolbar by |compressByHeight|; needed when the
-// bookmark bar is attached.
-- (void)setHeightCompression:(CGFloat)compressByHeight;
+// Returns the desired toolbar height for the given compression factor.
+- (CGFloat)desiredHeightForCompression:(CGFloat)compressByHeight;
 
 // Set the opacity of the divider (the line at the bottom) *if* we have a
 // |ToolbarView| (0 means don't show it); no-op otherwise.
 - (void)setDividerOpacity:(CGFloat)opacity;
 
 @end
 
 // A set of private methods used by tests, in the absence of "friends" in ObjC.
 @interface ToolbarController(PrivateTestMethods)
 // Returns an array of views in the order of the outlets above.
 - (NSArray*)toolbarViews;
 - (void)showOptionalHomeButton;
 - (void)showOptionalPageWrenchButtons;
 - (gfx::Rect)locationStackBounds;
 // Return a hover button for the current event.
 - (NSButton*)hoverButtonForEvent:(NSEvent*)theEvent;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_TOOLBAR_CONTROLLER_H_