demo mode: Add feature flag and keycombo for demo mode.

--enable-demo-mode switch turns on new demo mode feature that is under
development.
Ctrl+Alt+D shortcut opens new demo mode setup flow from OOBE (sign in screen).
It is used for development and might change in the future.

Change-Id: Ie3c0d954cd7d3d82f030873b9472debb1ebb2a1d
Bug: 812460
Reviewed-on: https://chromium-review.googlesource.com/914846Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Commit-Queue: Aga Wronska <agawronska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537820}

chrome/browser/chromeos/login/ui/webui_login_view.cc

@@ -89,6 +89,7 @@ const char kAccelNameDeviceRequisitionShark[] = "device_requisition_shark";
 const char kAccelNameAppLaunchBailout[] = "app_launch_bailout";
 const char kAccelNameAppLaunchNetworkConfig[] = "app_launch_network_config";
 const char kAccelNameBootstrappingSlave[] = "bootstrapping_slave";
+const char kAccelNameDemoMode[] = "demo_mode";
 
 // A class to change arrow key traversal behavior when it's alive.
 class ScopedArrowKeyTraversal {
@@ -175,6 +176,9 @@ WebUILoginView::WebUILoginView(const WebViewSettings& settings)
       ui::VKEY_S, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN | ui::EF_SHIFT_DOWN)] =
       kAccelNameBootstrappingSlave;
 
+  accel_map_[ui::Accelerator(
+      ui::VKEY_D, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)] = kAccelNameDemoMode;
+
   for (AccelMap::iterator i(accel_map_.begin()); i != accel_map_.end(); ++i) {
     if (!ash_util::IsRunningInMash()) {
       // To make reset accelerator work while system tray is open, register it

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

@@ -36,6 +36,7 @@
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
 #include "chromeos/chromeos_constants.h"
+#include "chromeos/chromeos_switches.h"
 #include "components/login/base_screen_handler_utils.h"
 #include "components/login/localized_values_builder.h"
 #include "components/prefs/pref_service.h"
@@ -183,6 +184,7 @@ void CoreOobeHandler::RegisterMessages() {
               &CoreOobeHandler::HandleSetOobeBootstrappingSlave);
   AddRawCallback("getPrimaryDisplayNameForTesting",
                  &CoreOobeHandler::HandleGetPrimaryDisplayNameForTesting);
+  AddCallback("setupDemoMode", &CoreOobeHandler::HandleSetupDemoMode);
 }
 
 void CoreOobeHandler::ShowSignInError(
@@ -561,6 +563,15 @@ void CoreOobeHandler::HandleGetPrimaryDisplayNameForTesting(
   ResolveJavascriptCallback(*callback_id, base::Value(display_name));
 }
 
+void CoreOobeHandler::HandleSetupDemoMode() {
+  const bool is_demo_mode_enabled =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          chromeos::switches::kEnableDemoMode);
+  if (is_demo_mode_enabled) {
+    NOTIMPLEMENTED();
+  }
+}
+
 void CoreOobeHandler::InitDemoModeDetection() {
   demo_mode_detector_.InitDetection();
 }

chrome/browser/ui/webui/chromeos/login/core_oobe_handler.h

@@ -122,6 +122,7 @@ class CoreOobeHandler : public BaseWebUIHandler,
   void HandleHeaderBarVisible();
   void HandleSetOobeBootstrappingSlave();
   void HandleGetPrimaryDisplayNameForTesting(const base::ListValue* args);
+  void HandleSetupDemoMode();
 
   // When keyboard_utils.js arrow key down event is reached, raise it
   // to tab/shift-tab event.

chromeos/chromeos_switches.cc

@@ -310,6 +310,9 @@ const char kEnableConsumerKiosk[] = "enable-consumer-kiosk";
 // Enables Data Saver prompt on cellular networks.
 const char kEnableDataSaverPrompt[] = "enable-datasaver-prompt";
 
+// Enables demo mode feature.
+const char kEnableDemoMode[] = "enable-demo-mode";
+
 // Enables the slider in display settings to modify the display size.
 const char kEnableDisplayZoomSetting[] = "enable-display-zoom-setting";
 

chromeos/chromeos_switches.h

@@ -92,6 +92,7 @@ CHROMEOS_EXPORT extern const char kEnableCastReceiver[];
 CHROMEOS_EXPORT extern const char kEnableChromeVoxArcSupport[];
 CHROMEOS_EXPORT extern const char kEnableConsumerKiosk[];
 CHROMEOS_EXPORT extern const char kEnableDataSaverPrompt[];
+CHROMEOS_EXPORT extern const char kEnableDemoMode[];
 CHROMEOS_EXPORT extern const char kEnableDisplayZoomSetting[];
 CHROMEOS_EXPORT extern const char kEnableEncryptionMigration[];
 CHROMEOS_EXPORT extern const char kEnableExperimentalAccessibilityFeatures[];

ui/login/display_manager.js

@@ -56,6 +56,7 @@
 /** @const */ var ACCELERATOR_APP_LAUNCH_NETWORK_CONFIG =
     'app_launch_network_config';
 /** @const */ var ACCELERATOR_BOOTSTRAPPING_SLAVE = "bootstrapping_slave";
+/** @const */ var ACCELERATOR_DEMO_MODE = "demo_mode";
 
 /* Signin UI state constants. Used to control header bar UI. */
 /** @const */ var SIGNIN_UI_STATE = {
@@ -187,6 +188,15 @@ cr.define('cr.ui.login', function() {
     SCREEN_OOBE_RESET,
   ];
 
+  /**
+   * Group of screens (screen IDs) where demo mode setup invocation is
+   * available.
+   * @type Array<string>
+   * @const
+   */
+  var DEMO_MODE_SETUP_AVAILABLE_SCREEN_GROUP = [
+    SCREEN_GAIA_SIGNIN,
+  ];
 
   /**
    * OOBE screens group index.
@@ -431,6 +441,11 @@ cr.define('cr.ui.login', function() {
           chrome.send('networkConfigRequest');
       } else if (name == ACCELERATOR_BOOTSTRAPPING_SLAVE) {
         chrome.send('setOobeBootstrappingSlave');
+      } else if (name == ACCELERATOR_DEMO_MODE) {
+        if (DEMO_MODE_SETUP_AVAILABLE_SCREEN_GROUP.indexOf(currentStepId) !=
+            -1) {
+          chrome.send('setupDemoMode');
+        }
       }
     },