Upstream Chrome on iOS source code [9/11].

ios/chrome/browser/ui/tabs/tab_strip_controller+tab_switcher_animation.h

Index: ios/chrome/browser/ui/tabs/tab_strip_controller+tab_switcher_animation.h
diff --git a/ios/chrome/browser/ui/tabs/tab_strip_controller+tab_switcher_animation.h b/ios/chrome/browser/ui/tabs/tab_strip_controller+tab_switcher_animation.h
new file mode 100644
index 0000000000000000000000000000000000000000..bf0e9d30b7205237145fce22a5de3541c7cf5f47
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+++ b/ios/chrome/browser/ui/tabs/tab_strip_controller+tab_switcher_animation.h
@@ -0,0 +1,24 @@
+// Copyright 2015 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_TABS_TAB_STRIP_CONTROLLER_TAB_SWITCHER_ANIMATION_H_
+#define IOS_CHROME_BROWSER_UI_TABS_TAB_STRIP_CONTROLLER_TAB_SWITCHER_ANIMATION_H_
+
+#include "base/ios/block_types.h"
+#import "ios/chrome/browser/ui/tabs/tab_strip_controller.h"
+
+@class TabSwitcherTabStripPlaceholderView;
+
+// This category is used by the tab switcher to start fold/unfold animations
+// on the tab strip controller.
+@interface TabStripController (TabSwitcherAnimation)
+
+// Returns a tab switcher tab strip placeholder view created from the current
+// state of the tab strip controller. It is used to animate the transition
+// from the browser view controller to the tab switcher.
+- (TabSwitcherTabStripPlaceholderView*)placeholderView;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_TABS_TAB_STRIP_CONTROLLER_TAB_SWITCHER_ANIMATION_H_