Fixed a fullscreen race condition on OSX

chrome/browser/ui/cocoa/browser_window_fullscreen_transition.h

Index: chrome/browser/ui/cocoa/browser_window_fullscreen_transition.h
diff --git a/chrome/browser/ui/cocoa/browser_window_fullscreen_transition.h b/chrome/browser/ui/cocoa/browser_window_fullscreen_transition.h
index 332bd949267b62259868147efeac6f2a7b4727af..55447eca48ada6376b72cbbbe28f7be7b1eb7199 100644
--- a/chrome/browser/ui/cocoa/browser_window_fullscreen_transition.h
+++ b/chrome/browser/ui/cocoa/browser_window_fullscreen_transition.h
@@ -9,6 +9,13 @@
 
 @class FramedBrowserWindow;
 
+@protocol BrowserWindowFullscreenTransitionDelegate

[Robert Sesek, 2016/03/18 16:41:13]

Does this class always operate on a BrowserWindowController? Thoughts on passing
that to the initializer (in lieu of passing in tabStripBackgroundView and
FramedBrowserWindow)? That would mean not adding this protocol.

+
+// Called after the exit fullscreen animation is completed.
+- (void)finishedExitingFullscreen;
+
+@end
+
 // This class is responsible for managing the custom transition of a
 // BrowserWindow from its normal state into an AppKit Fullscreen state
 // and vice versa.
@@ -101,13 +108,18 @@
 // enters fullscreen. initExitWithWindow will create one that exits fullscreen,
 // using |frame| as the frame that |window| is going to transition into.
 - (instancetype)initEnterWithWindow:(FramedBrowserWindow*)window;
-- (instancetype)initExitWithWindow:(FramedBrowserWindow*)window
-                             frame:(NSRect)frame
-            tabStripBackgroundView:(NSView*)view;
+- (instancetype)
+    initExitWithWindow:(FramedBrowserWindow*)window
+              delegate:(id<BrowserWindowFullscreenTransitionDelegate>)delegate
+                 frame:(NSRect)frame
+tabStripBackgroundView:(NSView*)view;
 
 // Returns the windows to be used in the custom fullscreen transition.
 - (NSArray*)customWindowsForFullScreenTransition;
 
+// Returns true if the fullscreen transition is completed.
+- (BOOL)isTransitionCompleted;
+
 // This method begins animation for exit or enter fullscreen transition.
 // In this method, the following happens:
 //   - Animates the snapshot to the expected final size of the window while