[ios clean] Consumer interface for WebContents

ios/clean/chrome/browser/ui/web_contents/web_contents_consumer.h

Index: ios/clean/chrome/browser/ui/web_contents/web_contents_consumer.h
diff --git a/ios/clean/chrome/browser/ui/web_contents/web_contents_consumer.h b/ios/clean/chrome/browser/ui/web_contents/web_contents_consumer.h
new file mode 100644
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+++ b/ios/clean/chrome/browser/ui/web_contents/web_contents_consumer.h
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+// Copyright 2017 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_CLEAN_CHROME_BROWSER_UI_WEB_CONTENTS_WEB_CONTENTS_CONSUMER_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_WEB_CONTENTS_WEB_CONTENTS_CONSUMER_H_
+
+#import <UIKit/UIKit.h>
+
+// A WebContentsConsumer (typically a view controller) uses data provided by
+// this protocol to display a web view.
+@protocol WebContentsConsumer
+// Called when the content view that the reciever should display changes.
+- (void)contentViewDidChange:(UIView*)contentsView;
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_WEB_CONTENTS_WEB_CONTENTS_CONSUMER_H_