Implemented fullscreen exit animation with AppKit

chrome/browser/ui/cocoa/framed_browser_window.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/ui/cocoa/framed_browser_window.h"
 
 #include "base/logging.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "chrome/browser/global_keyboard_shortcuts_mac.h"
 #include "chrome/browser/profiles/profile_avatar_icon_util.h"
@@ skipping 84 matching lines @@
                  object:miniaturizeButton_];
     [center addObserver:self
                selector:@selector(adjustZoomButton:)
                    name:NSViewFrameDidChangeNotification
                  object:zoomButton_];
   }
 
   return self;
 }
 
+// Overriding this method to prevent the OSX from automatically setting
+// the style mask
+- (void)setStyleMask:(NSUInteger)styleMask {
+    if (frameAndStyleLock_) {
+        return;
+    }
+    [super setStyleMask:styleMask];
+}
+
+// Overriding this method to prevent the OSX from automatically setting
+// the frame
+- (void)setFrame:(NSRect)frameRect display:(BOOL)flag animate:(BOOL)animateFlag {
+    if (frameAndStyleLock_) {
+        return;
+    }
+    [super setFrame:frameRect display:flag animate:animateFlag];
+}
+
 - (void)dealloc {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }
 
 - (void)adjustCloseButton:(NSNotification*)notification {
   [self adjustButton:[notification object]
               ofKind:NSWindowCloseButton];
 }
 
@@ skipping 55 matching lines @@
   if (!value) {
     value = [super accessibilityHitTest:point];
   }
   return value;
 }
 
 - (void)setShouldHideTitle:(BOOL)flag {
   shouldHideTitle_ = flag;
 }
 
+// This method sets a lock which prevents the the frame and style
+// of the window to be changed
+- (void) setFrameAndStyleLock:(BOOL)lock {
+  frameAndStyleLock_ = lock;
+}
+
 - (BOOL)_isTitleHidden {
   return shouldHideTitle_;
 }
 
 - (CGFloat)windowButtonsInterButtonSpacing {
   return windowButtonsInterButtonSpacing_;
 }
 
 // This method is called whenever a window is moved in order to ensure it fits
 // on the screen.  We cannot always handle resizes without breaking, so we
@@ skipping 148 matching lines @@
   ThemedWindowStyle windowStyle = [self themedWindowStyle];
   BOOL incognito = windowStyle & THEMED_INCOGNITO;
 
   if (incognito)
     return [NSColor whiteColor];
   else
     return [NSColor windowFrameTextColor];
 }
 
 @end