Added usage of ScreenContext in EulaScreen.

chrome/browser/ui/webui/chromeos/login/eula_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/eula_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/eula_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/eula_screen_handler.cc
index f03f4f25a48db229b2ee2d9dd0a28ad442bb4be9..dad03297ed0ef7a71ac508157b8b274e74e3ad27 100644
--- a/chrome/browser/ui/webui/chromeos/login/eula_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/eula_screen_handler.cc
@@ -10,6 +10,7 @@
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
 #include "chrome/browser/chromeos/login/helper.h"
 #include "chrome/browser/chromeos/login/screens/core_oobe_actor.h"
+#include "chrome/browser/chromeos/login/screens/eula_model.h"
 #include "chrome/browser/chromeos/login/ui/login_web_dialog.h"
 #include "chrome/browser/chromeos/login/ui/webui_login_display.h"
 #include "chrome/browser/profiles/profile.h"
@@ -80,14 +81,14 @@ namespace chromeos {
 
 EulaScreenHandler::EulaScreenHandler(CoreOobeActor* core_oobe_actor)
     : BaseScreenHandler(kJsScreenPath),
-      delegate_(NULL),
+      model_(NULL),
       core_oobe_actor_(core_oobe_actor),
       show_on_init_(false) {
 }
 
 EulaScreenHandler::~EulaScreenHandler() {
-  if (delegate_)
-    delegate_->OnActorDestroyed(this);
+  if (model_)
+    model_->OnViewDestroyed(this);
 }
 
 void EulaScreenHandler::PrepareToShow() {
@@ -104,12 +105,18 @@ void EulaScreenHandler::Show() {
 void EulaScreenHandler::Hide() {
 }
 
-void EulaScreenHandler::SetDelegate(Delegate* delegate) {
-  delegate_ = delegate;
+void EulaScreenHandler::Bind(EulaModel& model) {
+  model_ = &model;
+  BaseScreenHandler::set_base_screen(model_);
   if (page_is_ready())
     Initialize();
 }
 
+void EulaScreenHandler::Unbind() {
+  model_ = nullptr;
+  BaseScreenHandler::set_base_screen(nullptr);
+}
+
 void EulaScreenHandler::DeclareLocalizedValues(
     LocalizedValuesBuilder* builder) {
   builder->Add("eulaScreenTitle", IDS_EULA_SCREEN_TITLE);
@@ -139,6 +146,20 @@ void EulaScreenHandler::DeclareLocalizedValues(
   builder->Add("chromeosCreditsLink", IDS_ABOUT_CROS_VERSION_LICENSE_EULA);
 }
 
+void EulaScreenHandler::DeclareJSCallbacks() {
+  AddCallback("eulaAcceptButtonClicked",
+              &EulaScreenHandler::HandleAcceptButtonClicked);
+  AddCallback("eulaBackButtonClicked",
+              &EulaScreenHandler::HandleBackButtonClicked);
+  AddCallback("eulaOnLearnMore", &EulaScreenHandler::HandleOnLearnMore);
+  AddCallback("eulaOnChromeOSCredits",
+              &EulaScreenHandler::HandleOnChromeOSCredits);
+  AddCallback("eulaOnChromeCredits", &EulaScreenHandler::HandleOnChromeCredits);
+  AddCallback("eulaOnLearnMore", &EulaScreenHandler::HandleOnLearnMore);
+  AddCallback("eulaOnInstallationSettingsPopupOpened",
+              &EulaScreenHandler::HandleOnInstallationSettingsPopupOpened);
+}
+
 void EulaScreenHandler::GetAdditionalParameters(base::DictionaryValue* dict) {
 #if defined(ENABLE_RLZ)
   dict->SetString("rlzEnabled", "enabled");
@@ -148,14 +169,14 @@ void EulaScreenHandler::GetAdditionalParameters(base::DictionaryValue* dict) {
 }
 
 void EulaScreenHandler::Initialize() {
-  if (!page_is_ready() || !delegate_)
+  if (!page_is_ready() || !model_)
     return;
 
-  core_oobe_actor_->SetUsageStats(delegate_->IsUsageStatsEnabled());
+  core_oobe_actor_->SetUsageStats(model_->IsUsageStatsEnabled());
 
   // This OEM EULA is a file:// URL which we're unable to load in iframe.
   // Instead if it's defined we use chrome://terms/oem that will load same file.
-  if (!delegate_->GetOemEulaUrl().is_empty())
+  if (!model_->GetOemEulaUrl().is_empty())
     core_oobe_actor_->SetOemEulaUrl(chrome::kChromeUITermsOemURL);
 
   if (show_on_init_) {
@@ -164,25 +185,18 @@ void EulaScreenHandler::Initialize() {
   }
 }
 
-void EulaScreenHandler::RegisterMessages() {
-  AddCallback("eulaOnExit", &EulaScreenHandler::HandleOnExit);
-  AddCallback("eulaOnLearnMore", &EulaScreenHandler::HandleOnLearnMore);
-  AddCallback("eulaOnChromeOSCredits",
-              &EulaScreenHandler::HandleOnChromeOSCredits);
-  AddCallback("eulaOnChromeCredits",
-              &EulaScreenHandler::HandleOnChromeCredits);
-  AddCallback("eulaOnLearnMore", &EulaScreenHandler::HandleOnLearnMore);
-  AddCallback("eulaOnInstallationSettingsPopupOpened",
-              &EulaScreenHandler::HandleOnInstallationSettingsPopupOpened);
-}
-
 void EulaScreenHandler::OnPasswordFetched(const std::string& tpm_password) {
   core_oobe_actor_->SetTpmPassword(tpm_password);
 }
 
-void EulaScreenHandler::HandleOnExit(bool accepted, bool usage_stats_enabled) {
-  if (delegate_)
-    delegate_->OnExit(accepted, usage_stats_enabled);
+void EulaScreenHandler::HandleAcceptButtonClicked() {
+  if (model_)
+    model_->OnAcceptButtonClicked();
+}
+
+void EulaScreenHandler::HandleBackButtonClicked() {
+  if (model_)
+    model_->OnBackButtonClicked();
 }
 
 void EulaScreenHandler::HandleOnLearnMore() {
@@ -210,8 +224,8 @@ void EulaScreenHandler::HandleOnChromeCredits() {
 }
 
 void EulaScreenHandler::HandleOnInstallationSettingsPopupOpened() {
-  if (delegate_)
-    delegate_->InitiatePasswordFetch();
+  if (model_)
+    model_->InitiatePasswordFetch();
 }
 
 }  // namespace chromeos