Clang/mac: Declare stuff before using it.

chrome/browser/cocoa/fullscreen_controller.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_COCOA_FULLSCREEN_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_FULLSCREEN_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/cocoa_protocols_mac.h"
 #include "base/mac_util.h"
 #include "chrome/browser/cocoa/location_bar_view_mac.h"
 
 @class BrowserWindowController;
+@class DropdownAnimation;
 
 // Provides a controller to manage fullscreen mode for a single browser window.
 // This class handles running animations, showing and hiding the floating
 // dropdown bar, and managing the tracking area associated with the dropdown.
 // This class does not directly manage any views -- the BrowserWindowController
 // is responsible for positioning and z-ordering views.
 //
 // Tracking areas are disabled while animations are running.  If
 // |overlayFrameChanged:| is called while an animation is running, the
 // controller saves the new frame and installs the appropriate tracking area
@@ skipping 14 matching lines @@
 
   // The tracking area associated with the floating dropdown bar.  This tracking
   // area is attached to |contentView_|, because when the dropdown is completely
   // hidden, we still need to keep a 1px tall tracking area visible.  Attaching
   // to the content view allows us to do this.  |trackingArea_| can be nil if
   // not in fullscreen mode or during animations.
   scoped_nsobject<NSTrackingArea> trackingArea_;
 
   // Pointer to the currently running animation.  Is nil if no animation is
   // running.
-  scoped_nsobject<NSAnimation> currentAnimation_;
+  scoped_nsobject<DropdownAnimation> currentAnimation_;
 
   // Timers for scheduled showing/hiding of the bar (which are always done with
   // animation).
   scoped_nsobject<NSTimer> showTimer_;
   scoped_nsobject<NSTimer> hideTimer_;
 
   // Holds the current bounds of |trackingArea_|, even if |trackingArea_| is
   // currently nil.  Used to restore the tracking area when an animation
   // completes.
   NSRect trackingAreaBounds_;
@@ skipping 47 matching lines @@
 // Gets the current floating bar shown fraction.
 - (CGFloat)floatingBarShownFraction;
 
 // Sets a new current floating bar shown fraction.  NOTE: This function has side
 // effects, such as modifying the fullscreen mode (menu bar shown state).
 - (void)changeFloatingBarShownFraction:(CGFloat)fraction;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_FULLSCREEN_CONTROLLER_H_