Single pod autofocus disabled for touch view mode. Delegate class created for ash interactions.

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

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
index 5151a9a92556ec71643203342427d9d1075f0027..5eeff9c7d255667564ddb44722582aaad0182063 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
@@ -299,6 +299,9 @@ SigninScreenHandler::SigninScreenHandler(
   if (keyboard)
     keyboard->AddObserver(this);
 
+  max_mode_delegate_.reset(new TouchViewControllerDelegate());
+  max_mode_delegate_->AddObserver(this);
+
   policy::ConsumerManagementService* consumer_management =
       g_browser_process->platform_part()->browser_policy_connector_chromeos()->
           GetConsumerManagementService();
@@ -317,6 +320,8 @@ SigninScreenHandler::~SigninScreenHandler() {
   if (delegate_)
     delegate_->SetWebUIHandler(NULL);
   network_state_informer_->RemoveObserver(this);
+  max_mode_delegate_->RemoveObserver(this);
+  max_mode_delegate_.reset(NULL);
   ScreenlockBridge::Get()->SetLockHandler(NULL);
 }
 
@@ -771,6 +776,8 @@ void SigninScreenHandler::RegisterMessages() {
               &SigninScreenHandler::HandleGetPublicSessionKeyboardLayouts);
   AddCallback("cancelConsumerManagementEnrollment",
               &SigninScreenHandler::HandleCancelConsumerManagementEnrollment);
+  AddCallback("getTouchViewState",
+              &SigninScreenHandler::HandleGetTouchViewState);
 
 
   // This message is sent by the kiosk app menu, but is handled here
@@ -971,6 +978,14 @@ void SigninScreenHandler::Unlock(const std::string& user_email) {
   ScreenLocker::Hide();
 }
 
+void SigninScreenHandler::OnMaximizeModeStarted() {
+  CallJS("login.AccountPickerScreen.setTouchViewState", true);
+}
+
+void SigninScreenHandler::OnMaximizeModeEnded() {
+  CallJS("login.AccountPickerScreen.setTouchViewState", false);
+}
+
 bool SigninScreenHandler::ShouldLoadGaia() const {
   // Fetching of the extension is not started before account picker page is
   // loaded because it can affect the loading speed.
@@ -1368,6 +1383,11 @@ void SigninScreenHandler::HandleCancelConsumerManagementEnrollment() {
   ShowImpl();
 }
 
+void SigninScreenHandler::HandleGetTouchViewState() {
+  CallJS("login.AccountPickerScreen.setTouchViewState",
+         max_mode_delegate_->IsMaximizeModeEnabled());
+}
+
 bool SigninScreenHandler::AllWhitelistedUsersPresent() {
   CrosSettings* cros_settings = CrosSettings::Get();
   bool allow_new_user = false;