[arc-intents] Handle redirects.

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>
@@ skipping 19 matching lines @@
   // These enums are used to define the buckets for an enumerated UMA histogram
   // and need to be synced with histograms.xml. This enum class should also be
   // treated as append-only.
   enum class CloseReason : int {
     ERROR = 0,
     DIALOG_DEACTIVATED = 1,
     ALWAYS_PRESSED = 2,
     JUST_ONCE_PRESSED = 3,
     PREFERRED_ACTIVITY_FOUND = 4,
     SIZE,
+    INVALID = SIZE,
   };
 
   // Restricts the amount of apps displayed to the user without the need of a
   // ScrollView.
   enum { kMaxAppResults = 3 };
 
   using NameAndIcon = std::pair<std::string, gfx::Image>;
-  using ShowDisambigDialogCallback =
+  using ShowIntentPickerCallback =

[djacobo_, 2016/07/29 20:23:17]

Thanks for renaming here and all the repetitions, it's clearer now.

       base::Callback<void(content::NavigationHandle* handle,
                           const std::vector<NameAndIcon>& app_info,
                           const base::Callback<void(size_t, CloseReason)>& cb)>;
-  ArcNavigationThrottle(
-      content::NavigationHandle* navigation_handle,
-      const ShowDisambigDialogCallback& show_disambig_dialog_cb);
+  ArcNavigationThrottle(content::NavigationHandle* navigation_handle,
+                        const ShowIntentPickerCallback& show_intent_picker_cb);
   ~ArcNavigationThrottle() override;
 
  private:
   // content::Navigation implementation:
   NavigationThrottle::ThrottleCheckResult WillStartRequest() override;
   NavigationThrottle::ThrottleCheckResult WillRedirectRequest() override;
 
+  NavigationThrottle::ThrottleCheckResult HandleRequest();
   void OnAppCandidatesReceived(mojo::Array<mojom::UrlHandlerInfoPtr> handlers);
   void OnAppIconsReceived(
       mojo::Array<mojom::UrlHandlerInfoPtr> handlers,
       std::unique_ptr<ActivityIconLoader::ActivityToIconsMap> icons);
-  void OnDisambigDialogClosed(mojo::Array<mojom::UrlHandlerInfoPtr> handlers,
-                              size_t selected_app_index,
-                              CloseReason close_reason);
+  void OnIntentPickerClosed(mojo::Array<mojom::UrlHandlerInfoPtr> handlers,
+                            size_t selected_app_index,
+                            CloseReason close_reason);
   // Compares the host name of the referrer and target URL to decide whether
   // the navigation needs to be overriden.
   bool ShouldOverrideUrlLoading(content::NavigationHandle* navigation_handle);
 
   // 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
-  // OnDisambigDialogClosed().
-  ShowDisambigDialogCallback show_disambig_dialog_callback_;
+  // 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_;
+
+  // 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_