Turn ArcSupportHost from Observer model to Delegate

chrome/browser/chromeos/arc/arc_support_host.cc

 // 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.
 
 #include "chrome/browser/chromeos/arc/arc_support_host.h"
 
 #include <string>
 #include <utility>
 
 #include "ash/system/devicetype_utils.h"
@@ skipping 163 matching lines @@
 }
 
 void ArcSupportHost::RemoveObserver(Observer* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
 bool ArcSupportHost::HasObserver(Observer* observer) {
   return observer_list_.HasObserver(observer);
 }
 
+void ArcSupportHost::SetAuthHandler(AuthHandler* handler) {
+  DCHECK(!auth_handler_);
+  auth_handler_ = handler;
+}
+
+void ArcSupportHost::UnsetAuthHandler() {
+  DCHECK(auth_handler_);
+  auth_handler_ = nullptr;
+}
+
+void ArcSupportHost::SetTosHandler(TosHandler* handler) {
+  DCHECK(!tos_handler_);
+  tos_handler_ = handler;
+}
+
+void ArcSupportHost::UnsetTosHandler() {
+  DCHECK(tos_handler_);
+  tos_handler_ = nullptr;
+}
+
+void ArcSupportHost::SetErrorHandler(ErrorHandler* handler) {
+  DCHECK(!error_handler_);
+  error_handler_ = handler;
+}
+
+void ArcSupportHost::UnsetErrorHandler() {
+  DCHECK(error_handler_);
+  error_handler_ = nullptr;
+}
+
 void ArcSupportHost::SetArcManaged(bool is_arc_managed) {
   DCHECK(!message_host_);
   is_arc_managed_ = is_arc_managed;
 }
 
 void ArcSupportHost::Close() {
   ui_page_ = UIPage::NO_PAGE;
   if (!message_host_) {
     VLOG(2) << "ArcSupportHost::Close() is called "
             << "but message_host_ is not available.";
@@ skipping 320 matching lines @@
 }
 
 void ArcSupportHost::OnMessage(const base::DictionaryValue& message) {
   std::string event;
   if (!message.GetString(kEvent, &event)) {
     NOTREACHED();
     return;
   }
 
   if (event == kEventOnWindowClosed) {
-    for (auto& observer : observer_list_)
-      observer.OnWindowClosed();
+    if (tos_handler_) {
+      tos_handler_->OnTermsRejected();
+    } else {
+      //DCHECK(error_handler_);
+      if (error_handler_)
+        error_handler_->OnWindowClosed();
+    }
   } else if (event == kEventOnAuthSucceeded) {
     std::string code;
     if (message.GetString(kCode, &code)) {
-      for (auto& observer : observer_list_)
-        observer.OnAuthSucceeded(code);
+      if (auth_handler_) {
+        auth_handler_->OnAuthSucceeded(code);
+      } else {
+        LOG(ERROR) << "auth_handler_ is not set";
+      }
     } else {
       NOTREACHED();
     }
   } else if (event == kEventOnAuthFailed) {
-    for (auto& observer : observer_list_)
-      observer.OnAuthFailed();
+    if (auth_handler_) {
+      auth_handler_->OnAuthFailed();
+    } else {
+      LOG(ERROR) << "auth_handler_ is not set";
+    }
   } else if (event == kEventOnAgreed) {
     bool is_metrics_enabled;
     bool is_backup_restore_enabled;
     bool is_location_service_enabled;
     if (message.GetBoolean(kIsMetricsEnabled, &is_metrics_enabled) &&
         message.GetBoolean(kIsBackupRestoreEnabled,
                            &is_backup_restore_enabled) &&
         message.GetBoolean(kIsLocationServiceEnabled,
                            &is_location_service_enabled)) {
-      for (auto& observer : observer_list_) {
-        observer.OnTermsAgreed(is_metrics_enabled, is_backup_restore_enabled,
-                               is_location_service_enabled);
+      if (tos_handler_) {
+        tos_handler_->OnTermsAgreed(is_metrics_enabled,
+                                   is_backup_restore_enabled,
+                                   is_location_service_enabled);
+      } else {
+        LOG(ERROR) << "tos_handler_ is not set";
       }
     } else {
       NOTREACHED();
     }
   } else if (event == kEventOnRetryClicked) {
-    for (auto& observer : observer_list_)
-      observer.OnRetryClicked();
+    if (!tos_handler_) {
+      tos_handler_->OnTermsError();
+    } else {
+      if (error_handler_)
+        error_handler_->OnRetryClicked();
+    }
+    //DCHECK(auth_handler_);
+    if (auth_handler_)
+      auth_handler_->OnAuthRetry();
+
   } else if (event == kEventOnSendFeedbackClicked) {
-    for (auto& observer : observer_list_)
-      observer.OnSendFeedbackClicked();
+    if (error_handler_) {
+      error_handler_->OnSendFeedbackClicked();
+    } else {
+      LOG(ERROR) << "error_handler_ is not set";
+    }
   } else {
     LOG(ERROR) << "Unknown message: " << event;
     NOTREACHED();
   }
 }