Implemented fullscreen exit animation with AppKit

chrome/browser/ui/cocoa/framed_browser_window.h

Index: chrome/browser/ui/cocoa/framed_browser_window.h
diff --git a/chrome/browser/ui/cocoa/framed_browser_window.h b/chrome/browser/ui/cocoa/framed_browser_window.h
index ec6da688f6e308387b6e555bae23564dec4bb4c7..6d240f3d6f00c91a5760e4cd3165336993c70333 100644
--- a/chrome/browser/ui/cocoa/framed_browser_window.h
+++ b/chrome/browser/ui/cocoa/framed_browser_window.h
@@ -35,6 +35,10 @@ const CGFloat kBrowserFrameViewPaintHeight = 60.0;
   NSButton* miniaturizeButton_;
   NSButton* zoomButton_;
 
+  // Locks the window's frame and style mask. If it's set to YES, then the
+  // frame and the style mask cannot be changed.
+  BOOL frameAndStyleMaskLock_;
+
   CGFloat windowButtonsInterButtonSpacing_;
 }
 
@@ -45,6 +49,16 @@ const CGFloat kBrowserFrameViewPaintHeight = 60.0;
 // Tells the window to suppress title drawing.
 - (void)setShouldHideTitle:(BOOL)flag;
 
+- (void)setFrameAndStyleMaskLock:(BOOL)lock;
+
+// This method is overridden to prevent AppKit from  setting the style mask
+// when frameAndStyleMaskLock_ is set to true.
+- (void)setStyleMask:(NSUInteger)styleMask;
+
+// This method is overridden to prevent the AppKit from setting the frame
+// when frameAndStyleMaskLock_ is set to true.
+- (void)setFrame:(NSRect)frameRect display:(BOOL)flag animate:(BOOL)animateFlag;
+
 // Returns the desired spacing between window control views.
 - (CGFloat)windowButtonsInterButtonSpacing;