FullscreenExitBubble temp UI for Mac.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index bd221324a48707e3d077e8616bbcf3923e937611..ec2aa7360811d23a9aee4e340f9232049a92a49a 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -1314,7 +1314,13 @@ void Browser::WindowFullscreenStateChanged() {
   MessageLoop::current()->PostTask(
       FROM_HERE, method_factory_.NewRunnableMethod(
       &Browser::NotifyFullscreenChange));
-  if (!window_->IsFullscreen())
+  bool notify_tab_of_exit;
+#if defined(OS_MACOSX)
+  notify_tab_of_exit = !window_->InPresentationMode();
+#else
+  notify_tab_of_exit = !window_->IsFullscreen();
+#endif
+  if (notify_tab_of_exit)
     NotifyTabOfFullscreenExitIfNecessary();
 }
 
@@ -3831,10 +3837,21 @@ void Browser::ToggleFullscreenModeForTab(TabContents* tab,
     return;
   fullscreened_tab_ = enter_fullscreen ?
       TabContentsWrapper::GetCurrentWrapperForContents(tab) : NULL;
-  if (enter_fullscreen && !window_->IsFullscreen())
+  bool in_correct_mode_for_tab_fullscreen;
+#if defined(OS_MACOSX)
+  in_correct_mode_for_tab_fullscreen = window_->InPresentationMode();
+#else
+  in_correct_mode_for_tab_fullscreen = window_->IsFullscreen();
+#endif
+  if (enter_fullscreen && !in_correct_mode_for_tab_fullscreen)
     tab_caused_fullscreen_ = true;
-  if (tab_caused_fullscreen_)
+  if (tab_caused_fullscreen_) {
+#if defined(OS_MACOSX)
+    TogglePresentationMode();
+#else
     ToggleFullscreenMode();
+#endif
+  }
 }
 
 void Browser::JSOutOfMemory(TabContents* tab) {