[USB enrollment] Add Configuration to OOBE Screens.

TBR=alemate@chromium.org

Bug: 854101
Change-Id: I4792b0bef59a71d6628da8337043f00ca4b0e5b2
Reviewed-on: https://chromium-review.googlesource.com/1069268Reviewed-by: Denis Kuznetsov <antrim@chromium.org>
Commit-Queue: Denis Kuznetsov <antrim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570708}

chrome/browser/chromeos/login/screens/base_screen.cc

@@ -119,4 +119,8 @@ void BaseScreen::OnContextChanged(const base::DictionaryValue& diff) {
     OnContextKeyUpdated(key);
 }
 
+void BaseScreen::SetConfiguration(base::DictionaryValue* configuration) {
+  configuration_ = configuration;
+}
+
 }  // namespace chromeos

chrome/browser/chromeos/login/screens/base_screen.h

@@ -68,6 +68,8 @@ class BaseScreen {
 
   void set_model_view_channel(ModelViewChannel* channel) { channel_ = channel; }
 
+  virtual void SetConfiguration(base::DictionaryValue* configuration);
+
  protected:
   // Scoped context editor, which automatically commits all pending
   // context changes on destruction.
@@ -114,6 +116,16 @@ class BaseScreen {
   // current BaseScreen instance.
   ContextEditor GetContextEditor();
 
+  // Global configuration for OOBE screens, that can be used to automate some
+  // screens.
+  // Screens can use values in Configuration to fill in UI values or
+  // automatically finish.
+  // Configuration is guaranteed to exist between pair of OnShow/OnHide calls,
+  // no external changes will be made to configuration during that time.
+  // Do not confuse it with Context, which is a way to communicate with
+  // JS-based UI part of the screen.
+  base::DictionaryValue* GetConfiguration() const { return configuration_; }
+
   BaseScreenDelegate* get_base_screen_delegate() const {
     return base_screen_delegate_;
   }
@@ -142,6 +154,8 @@ class BaseScreen {
   // counterpart.
   void OnContextChanged(const base::DictionaryValue& diff);
 
+  base::DictionaryValue* configuration_ = nullptr;
+
   ModelViewChannel* channel_ = nullptr;
 
   BaseScreenDelegate* base_screen_delegate_ = nullptr;

chrome/browser/chromeos/login/screens/mock_welcome_screen.h

@@ -21,6 +21,7 @@ class MockWelcomeScreen : public WelcomeScreen {
 
   MOCK_METHOD0(Show, void());
   MOCK_METHOD0(Hide, void());
+  MOCK_METHOD1(SetConfiguration, void(base::DictionaryValue* configuration));
 };
 
 class MockWelcomeView : public WelcomeView {

chrome/browser/chromeos/login/wizard_controller.cc

@@ -268,7 +268,10 @@ bool WizardController::zero_delay_enabled_ = false;
 PrefService* WizardController::local_state_for_testing_ = nullptr;
 
 WizardController::WizardController(LoginDisplayHost* host, OobeUI* oobe_ui)
-    : host_(host), oobe_ui_(oobe_ui), weak_factory_(this) {
+    : host_(host),
+      oobe_ui_(oobe_ui),
+      oobe_configuration_(new base::DictionaryValue()),
+      weak_factory_(this) {
   DCHECK(default_controller_ == nullptr);
   default_controller_ = this;
   screen_manager_ = std::make_unique<ScreenManager>(this);
@@ -1109,6 +1112,7 @@ void WizardController::ShowCurrentScreen() {
   smooth_show_timer_.Stop();
 
   UpdateStatusAreaVisibilityForScreen(current_screen_->screen_id());
+  current_screen_->SetConfiguration(oobe_configuration_.get());
   current_screen_->Show();
 }
 
@@ -1123,8 +1127,10 @@ void WizardController::SetCurrentScreenSmooth(BaseScreen* new_current,
 
   smooth_show_timer_.Stop();
 
-  if (current_screen_)
+  if (current_screen_) {
     current_screen_->Hide();
+    current_screen_->SetConfiguration(nullptr);
+  }
 
   const OobeScreen screen = new_current->screen_id();
   if (IsOOBEStepToTrack(screen))

chrome/browser/chromeos/login/wizard_controller.h

@@ -444,6 +444,9 @@ class WizardController : public BaseScreenDelegate,
   std::unique_ptr<pairing_chromeos::SharkConnectionListener>
       shark_connection_listener_;
 
+  // Configuration for automating OOBE screens.
+  std::unique_ptr<base::DictionaryValue> oobe_configuration_;
+
   BaseScreen* hid_screen_ = nullptr;
 
   base::WeakPtrFactory<WizardController> weak_factory_;