[ios] Adds support for Find in Page to the new architecture.

ios/clean/chrome/browser/ui/find_in_page/find_in_page_consumer.h

Index: ios/clean/chrome/browser/ui/find_in_page/find_in_page_consumer.h
diff --git a/ios/clean/chrome/browser/ui/find_in_page/find_in_page_consumer.h b/ios/clean/chrome/browser/ui/find_in_page/find_in_page_consumer.h
new file mode 100644
index 0000000000000000000000000000000000000000..9e1ba694b5f19cf933302883402b4f1de197576f
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+++ b/ios/clean/chrome/browser/ui/find_in_page/find_in_page_consumer.h
@@ -0,0 +1,18 @@
+// 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_FIND_IN_PAGE_FIND_IN_PAGE_CONSUMER_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_FIND_IN_PAGE_FIND_IN_PAGE_CONSUMER_H_
+
+// FindInPageConsumer sets the current appearance of the find bar based on
+// various sources provided by the mediator.
+@protocol FindInPageConsumer
+
+// Updates the display of the total number of matches on the page and the index
+// of the currently-highlighted matches.
+- (void)setCurrentMatch:(NSUInteger)current ofTotalMatches:(NSUInteger)total;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_FIND_IN_PAGE_FIND_IN_PAGE_CONSUMER_H_