Pass WebState to NativeAppNavigationController

ios/chrome/browser/native_app_launcher/native_app_navigation_controller.h

 // Copyright 2012 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_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_CONTROLLER_H_
 
 #import <Foundation/Foundation.h>
 
 #import "ios/chrome/browser/native_app_launcher/native_app_navigation_controller_protocol.h"
 #import "ios/web/public/web_state/crw_web_controller_observer.h"
 
 @class Tab;
 
 namespace net {
 class URLRequestContextGetter;
 }  // namespace net
 
+namespace web {
+class WebState;
+}  // namespace web
+
 // NativeAppNavigationController brings up a GAL Infobar if the webpage directs
 // it to do so and there are no other circumstances that would suppress its
 // display.
 @interface NativeAppNavigationController
     : NSObject<CRWWebControllerObserver, NativeAppNavigationControllerProtocol>
 
-// Designated initializer.
-- (id)initWithRequestContextGetter:(net::URLRequestContextGetter*)context
-                               tab:(Tab*)tab;
+// Use -initWithWebState:requestContextGetter:tab: instead.
+- (instancetype)init NS_UNAVAILABLE;

[rohitrao (ping after 24h), 2017/01/24 14:24:56]

We generally put the unavailable initializers after the designated one.  That
should also make the comment unnecessary.

[pkl (ping after 24h if needed), 2017/01/26 00:30:17]

Done.

+
+// Designated initializer. The use of |tab| will be phased out in the future
+// when all the information needed can be fulfilled by |webState|.
+- (instancetype)initWithWebState:(web::WebState*)webState
+            requestContextGetter:(net::URLRequestContextGetter*)context
+                             tab:(Tab*)tab NS_DESIGNATED_INITIALIZER;
 
 // Copies the list of applications possibly being installed and register to be
 // notified of their installation.
 - (void)copyStateFrom:(NativeAppNavigationController*)controller;
 @end
 
 #endif  // IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_CONTROLLER_H_