Modifies how Arc's throttle handles redirections

chrome/browser/chromeos/arc/arc_navigation_throttle.h

 // 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 CHROME_BROWSER_CHROMEOS_ARC_ARC_NAVIGATION_THROTTLE_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_NAVIGATION_THROTTLE_H_
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/arc/intent_helper/activity_icon_loader.h"
 #include "content/public/browser/navigation_throttle.h"
 #include "ui/gfx/image/image.h"
-
-class GURL;
+#include "url/gurl.h"
 
 namespace content {
 class NavigationHandle;
 class WebContents;
 }  // namespace content
 
 namespace arc {
 
 // A class that allow us to retrieve ARC app's information and handle URL
 // traffic initiated on Chrome browser, either on Chrome or an ARC's app.
@@ skipping 42 matching lines @@
 
   NavigationThrottle::ThrottleCheckResult HandleRequest();
   void OnAppCandidatesReceived(
       mojo::Array<mojom::IntentHandlerInfoPtr> handlers);
   void OnAppIconsReceived(
       mojo::Array<mojom::IntentHandlerInfoPtr> handlers,
       std::unique_ptr<ActivityIconLoader::ActivityToIconsMap> icons);
   void OnIntentPickerClosed(mojo::Array<mojom::IntentHandlerInfoPtr> handlers,
                             std::string selected_app_package,
                             CloseReason close_reason);
+  GURL GetStartingGURL() const;
   // A callback object that allow us to display an IntentPicker when Run() is
   // executed, it also allow us to report the user's selection back to
   // OnIntentPickerClosed().
   ShowIntentPickerCallback show_intent_picker_callback_;
 
   // A cache of the action the user took the last time this navigation throttle
   // popped up the intent picker dialog.  If the dialog has never been popped up
   // before, this will have a value of CloseReason::INVALID.  Used to avoid
   // popping up the dialog multiple times on chains of multiple redirects.
   CloseReason previous_user_action_;
 
+  // Keeps a referrence to the starting GURL.
+  GURL starting_gurl_;
+
   // This has to be the last member of the class.
   base::WeakPtrFactory<ArcNavigationThrottle> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcNavigationThrottle);
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_NAVIGATION_THROTTLE_H_