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

ios/chrome/browser/ui/toolbar/toolbar_controller+protected.h

+// Copyright 2014 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_TOOLBAR_TOOLBAR_CONTROLLER_PROTECTED_H_
+#define IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_CONTROLLER_PROTECTED_H_
+
+#import "ios/chrome/browser/ui/toolbar/toolbar_controller.h"
+
+@interface ToolbarController (Protected)
+
+// Animation key used for toolbar transition animations.
+extern NSString* const kToolbarTransitionAnimationKey;
+
+// An array of CALayers that are currently animating under
+// kToolbarTransitionAnimationKey.
+@property(nonatomic, readonly) NSMutableArray* transitionLayers;
+
+// Adds transition animations to every UIButton in |containerView| with a
+// nonzero opacity.
+- (void)animateTransitionForButtonsInView:(UIView*)containerView
+                     containerBeginBounds:(CGRect)containerBeginBounds
+                       containerEndBounds:(CGRect)containerEndBounds
+                          transitionStyle:(ToolbarTransitionStyle)style;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_CONTROLLER_PROTECTED_H_