[ios clean] Creates ToolbarWebState Mediator

ios/clean/chrome/browser/ui/toolbar/toolbar_consumer.h

Index: ios/clean/chrome/browser/ui/toolbar/toolbar_consumer.h
diff --git a/ios/clean/chrome/browser/ui/toolbar/toolbar_consumer.h b/ios/clean/chrome/browser/ui/toolbar/toolbar_consumer.h
new file mode 100644
index 0000000000000000000000000000000000000000..89b51f951bd5a600f5de3c14298f788dd81ca0fb
--- /dev/null
+++ b/ios/clean/chrome/browser/ui/toolbar/toolbar_consumer.h
@@ -0,0 +1,17 @@
+// 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_TOOLBAR_TOOLBAR_CONSUMER_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_CONSUMER_H_
+
+#import <UIKit/UIKit.h>
+
+// ToolbarConsumer sets the current appearance of the Toolbar based on
+// WebState or other data sources provided by this protocol.
+@protocol ToolbarConsumer
+// Sets the text for a label appearing in the center of the toolbar.
+- (void)setCurrentPageText:(NSString*)text;
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_CONSUMER_H_