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..b413118c44d3ea307f5bbd32d1c4e109bb644c86 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 +49,18 @@ const CGFloat kBrowserFrameViewPaintHeight = 60.0;
 // Tells the window to suppress title drawing.
 - (void)setShouldHideTitle:(BOOL)flag;
 
+// This method sets a lock which prevents the the frame and style

[erikchen, 2015/08/12 22:08:53]

please reformat your comment to wrap at 80 columns.

Grammar check, please. I suggest:
"""
When the lock is set, the frame and style of the Window cannot be changed. This
is used to prevent undesired AppKit resizes of the Window.
"""

[spqchan1, 2015/08/13 20:38:48]

Done. 

+// of the window to be changed
+- (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;