[ios] Adds protocols for native app launching

ios/public/provider/chrome/browser/native_app_launcher/native_app_whitelist_manager.h

Index: ios/public/provider/chrome/browser/native_app_launcher/native_app_whitelist_manager.h
diff --git a/ios/public/provider/chrome/browser/native_app_launcher/native_app_whitelist_manager.h b/ios/public/provider/chrome/browser/native_app_launcher/native_app_whitelist_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..071ffb957164520f0898a69c4d8b439dc6888b4d
--- /dev/null
+++ b/ios/public/provider/chrome/browser/native_app_launcher/native_app_whitelist_manager.h
@@ -0,0 +1,43 @@
+// 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_NATIVE_APP_LAUNCHER_NATIVE_APP_WHITELIST_MANAGER_H_
+#define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_WHITELIST_MANAGER_H_
+
+#import <Foundation/Foundation.h>
+
+class GURL;
+@protocol NativeAppMetadata;
+typedef BOOL (^NativeAppFilter)(const id<NativeAppMetadata> app, BOOL* stop);
+
+@protocol NativeAppWhitelistManager<NSObject>
+
+// Sets a new application list to this object.
+// The |tldList| is an array of NSStrings enumerating supported top level
+// domains without the "." (i.e. @"com" and not @".com").
+// |storeIDs| is an optional array of App Store IDs to select only
+// listed apps from |appList|. If |storeIDs| is nil, all apps from |appList|
+// will be used.
+- (void)setAppList:(NSArray*)appList
+           tldList:(NSArray*)tldList
+    acceptStoreIDs:(NSArray*)storeIDs;
+
+// Returns a new object with the metadata about the iOS native application that
+// can handle |url|. Returns nil otherwise. Caller owns the returned object
+// and needs to release it when done.
+- (id<NativeAppMetadata>)newNativeAppForURL:(const GURL&)url;
+
+// Returns an autoreleased NSArray of NativeAppMetadata objects which
+// |condition| block returns YES.
+- (NSArray*)filteredAppsUsingBlock:(NativeAppFilter)condition;
+
+// Returns a scheme opening the app. Returns nil if no scheme is found.
+- (NSURL*)schemeForAppId:(NSString*)appId;
+
+// Checks for installed Apps.
+- (void)checkInstalledApps;
+
+@end
+
+#endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_WHITELIST_MANAGER_H_