ui: Cleanup class/struct forward declarations

chrome/browser/chromeos/arc/arc_support_host.h

Index: chrome/browser/chromeos/arc/arc_support_host.h
diff --git a/chrome/browser/chromeos/arc/arc_support_host.h b/chrome/browser/chromeos/arc/arc_support_host.h
index 72860cb33e5de5509fac0c3fa9f7645018068bf8..59099095f5a3665ddf1821d4e9dece0a84b7a8e3 100644
--- a/chrome/browser/chromeos/arc/arc_support_host.h
+++ b/chrome/browser/chromeos/arc/arc_support_host.h
@@ -8,32 +8,60 @@
 #include <memory>
 
 #include "base/macros.h"
-#include "chrome/browser/chromeos/arc/arc_auth_service.h"
 #include "chrome/browser/chromeos/arc/extensions/arc_support_message_host.h"
-#include "chrome/browser/chromeos/arc/optin/arc_optin_preference_handler_observer.h"
 #include "extensions/browser/api/messaging/native_message_host.h"
 #include "ui/display/display_observer.h"
 
-namespace arc {
-class ArcOptInPreferenceHandler;
-}
-
 // Native interface to control ARC support chrome App.
 // TODO(hidehiko): Move more implementation for the UI control from
-// ArcAuthService to this class and remove
-// arc::ArcOptInPreferenceHandlerObserver inheritance.
+// ArcAuthService to this class.
 // TODO(hidehiko,lhchavez): Move this into extensions/ directory, and put it
 // into "arc" namespace. Add unittests at the time.
 class ArcSupportHost : public arc::ArcSupportMessageHost::Observer,
-                       public arc::ArcOptInPreferenceHandlerObserver,
                        public display::DisplayObserver {
  public:
+  enum class UIPage {
+    NO_PAGE,              // Hide everything.
+    TERMS,                // Terms content page.
+    LSO_PROGRESS,         // LSO loading progress page.
+    LSO,                  // LSO page to enter user's credentials.
+    START_PROGRESS,       // Arc starting progress page.
+    ERROR,                // Arc start error page.
+    ERROR_WITH_FEEDBACK,  // Arc start error page, plus feedback button.
+  };
+
+  // Observer to notify UI event.
+  class Observer {
+   public:
+    virtual ~Observer() = default;
+
+    // Called when the ARC support window is closed.
+    virtual void OnWindowClosed() = 0;
+
+    // Called when the user press AGREE button on ToS page.
+    // TODO(hidehiko): Currently, due to implementation reason,
+    // this is also called when RETRY on error page is clicked. Fix this.
+    virtual void OnTermsAgreed(bool is_metrics_enabled,
+                               bool is_backup_and_restore_enabled,
+                               bool is_location_service_enabled) = 0;
+
+    // Called when LSO auth token fetch is successfully completed.
+    virtual void OnAuthSucceeded(const std::string& auth_code) = 0;
+
+    // Called when send feedback button on error page is clicked.
+    virtual void OnSendFeedbackClicked() = 0;
+  };
+
   static const char kHostAppId[];
   static const char kStorageId[];
 
   ArcSupportHost();
   ~ArcSupportHost() override;
 
+  // Currently only one observer can be added.
+  // TODO(hidehiko): Support RemoveObserver. Support multiple observer.
+  void AddObserver(Observer* observer);
+
   // Called when the communication to arc_support Chrome App is ready.
   void SetMessageHost(arc::ArcSupportMessageHost* message_host);
 
@@ -46,7 +74,11 @@ class ArcSupportHost : public arc::ArcSupportMessageHost::Observer,
 
   // Requests to close the extension window.
   void Close();
-  void ShowPage(arc::ArcAuthService::UIPage page, const base::string16& status);
+  void ShowPage(UIPage page, const base::string16& status);
+
+  void SetMetricsPreferenceCheckbox(bool is_enabled, bool is_managed);
+  void SetBackupAndRestorePreferenceCheckbox(bool is_enabled, bool is_managed);
+  void SetLocationServicesPreferenceCheckbox(bool is_enabled, bool is_managed);
 
   // arc::ArcSupportMessageHost::Observer override:
   void OnMessage(const base::DictionaryValue& message) override;
@@ -57,12 +89,16 @@ class ArcSupportHost : public arc::ArcSupportMessageHost::Observer,
   void OnDisplayMetricsChanged(const display::Display& display,
                                uint32_t changed_metrics) override;
 
-  // arc::ArcOptInPreferenceHandlerObserver:
-  void OnMetricsModeChanged(bool enabled, bool managed) override;
-  void OnBackupAndRestoreModeChanged(bool enabled, bool managed) override;
-  void OnLocationServicesModeChanged(bool enabled, bool managed) override;
-
  private:
+  struct PreferenceCheckboxData {
+    PreferenceCheckboxData() : PreferenceCheckboxData(false, false) {}
+    PreferenceCheckboxData(bool is_enabled, bool is_managed)
+        : is_enabled(is_enabled), is_managed(is_managed) {}
+
+    bool is_enabled;
+    bool is_managed;
+  };
+
   bool Initialize();
 
   // Sends a preference update to the extension.
@@ -72,18 +108,22 @@ class ArcSupportHost : public arc::ArcSupportMessageHost::Observer,
   //   'enabled': is_enabled,
   //   'managed': is_managed
   // }
-  void SendPreferenceUpdate(const std::string& action_name,
-                            bool is_enabled,
-                            bool is_managed);
+  void SendPreferenceCheckboxUpdate(const std::string& action_name,
+                                    const PreferenceCheckboxData& data);
 
   void DisconnectMessageHost();
 
+  // Currently Observer is only ArcAuthService, so it is unique.
+  // Use ObserverList when more classes start to observe it.
+  Observer* observer_ = nullptr;
+
+  PreferenceCheckboxData metrics_checkbox_;
+  PreferenceCheckboxData backup_and_restore_checkbox_;
+  PreferenceCheckboxData location_services_checkbox_;
+
   // The instance is created and managed by Chrome.
   arc::ArcSupportMessageHost* message_host_ = nullptr;
 
-  // Handles preferences and metrics mode.
-  std::unique_ptr<arc::ArcOptInPreferenceHandler> preference_handler_;
-
   DISALLOW_COPY_AND_ASSIGN(ArcSupportHost);
 };