fix for 27454 - Fade out close button state on mouse exit

chrome/browser/ui/cocoa/tabpose_window.mm

Index: chrome/browser/ui/cocoa/tabpose_window.mm
diff --git a/chrome/browser/ui/cocoa/tabpose_window.mm b/chrome/browser/ui/cocoa/tabpose_window.mm
index 1912c16389745937441fa61164528432279a2da8..e64e7d50294f82ef220c7f04822a2b4c9ff40f1a 100644
--- a/chrome/browser/ui/cocoa/tabpose_window.mm
+++ b/chrome/browser/ui/cocoa/tabpose_window.mm
@@ -20,6 +20,7 @@
 #include "chrome/browser/renderer_host/render_widget_host_view_mac.h"
 #include "chrome/browser/tab_contents/thumbnail_generator.h"
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
+#include "chrome/browser/ui/cocoa/animation_utils.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_constants.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_container_controller.h"
@@ -351,36 +352,6 @@ void ThumbnailLoader::LoadThumbnail() {
 
 @end
 
-namespace {
-
-class ScopedCAActionDisabler {
- public:
-  ScopedCAActionDisabler() {
-    [CATransaction begin];
-    [CATransaction setValue:[NSNumber numberWithBool:YES]
-                     forKey:kCATransactionDisableActions];
-  }
-
-  ~ScopedCAActionDisabler() {
-    [CATransaction commit];
-  }
-};
-
-class ScopedCAActionSetDuration {
- public:
-  explicit ScopedCAActionSetDuration(CGFloat duration) {
-    [CATransaction begin];
-    [CATransaction setValue:[NSNumber numberWithFloat:duration]
-                     forKey:kCATransactionAnimationDuration];
-  }
-
-  ~ScopedCAActionSetDuration() {
-    [CATransaction commit];
-  }
-};
-
-}  // namespace
-
 // Given the number |n| of tiles with a desired aspect ratio of |a| and a
 // desired distance |dx|, |dy| between tiles, returns how many tiles fit
 // vertically into a rectangle with the dimensions |w_c|, |h_c|. This returns