[ios] Adds protocols for voice search.

ios/public/provider/chrome/browser/voice/voice_search_bar_owner.h

Index: ios/public/provider/chrome/browser/voice/voice_search_bar_owner.h
diff --git a/ios/public/provider/chrome/browser/voice/voice_search_bar_owner.h b/ios/public/provider/chrome/browser/voice/voice_search_bar_owner.h
new file mode 100644
index 0000000000000000000000000000000000000000..5ff7704e49f2a124fa72b492eac8c1776c5c5cd9
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+++ b/ios/public/provider/chrome/browser/voice/voice_search_bar_owner.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.
+
+#ifndef IOS_PUBLIC_PROVIDER_CHROME_BROWSER_VOICE_VOICE_SEARCH_BAR_OWNER_H_
+#define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_VOICE_VOICE_SEARCH_BAR_OWNER_H_
+
+#import <Foundation/Foundation.h>
+
+@protocol VoiceSearchBar;
+
+// Protocol implemented by UIViewControllers that own a VoiceSearchBar.
+@protocol VoiceSearchBarOwner<NSObject>
+
+// The VoiceSearchBar.
+@property(nonatomic, readonly) id<VoiceSearchBar> voiceSearchBar;
+
+@end
+
+#endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_VOICE_VOICE_SEARCH_BAR_OWNER_H_