Upstream Chrome on iOS source code [3/11].

ios/chrome/browser/ui/animators/zoom_transition_delegate.h

Index: ios/chrome/browser/ui/animators/zoom_transition_delegate.h
diff --git a/ios/chrome/browser/ui/animators/zoom_transition_delegate.h b/ios/chrome/browser/ui/animators/zoom_transition_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..103588382dfb57b4058a80be187ffd2a0b123646
--- /dev/null
+++ b/ios/chrome/browser/ui/animators/zoom_transition_delegate.h
@@ -0,0 +1,20 @@
+// Copyright 2016 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.
+
+// ======                        New Architecture                         =====
+// =         This code is only used in the new iOS Chrome architecture.       =
+// ============================================================================
+
+#ifndef IOS_CHROME_BROWSER_UI_ANIMATORS_ZOOM_TRANSITION_DELEGATE_H_
+#define IOS_CHROME_BROWSER_UI_ANIMATORS_ZOOM_TRANSITION_DELEGATE_H_
+
+#import <UIKit/UIKit.h>
+
+@protocol ZoomTransitionDelegate<NSObject>
+// The rectangle to start or end a zoom transition in for the object identified
+// by |key|, expressed in |view|'s coordinates.
+- (CGRect)rectForZoomWithKey:(NSObject*)key inView:(UIView*)view;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_ANIMATORS_ZOOM_TRANSITION_DELEGATE_H_