cros: Bind password echo with TouchView mode

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index cf51aaf94624add6a7e3ec88f26fea70264e56e4..ebbe8e6822fc40417f1f9bde529bbd7ddc5e76e2 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -78,6 +78,7 @@
 #include "chrome/browser/chromeos/status/data_promo_notification.h"
 #include "chrome/browser/chromeos/system/input_device_settings.h"
 #include "chrome/browser/chromeos/ui/low_disk_notification.h"
+#include "chrome/browser/chromeos/ui/password_echo_controller.h"
 #include "chrome/browser/chromeos/upgrade_detector_chromeos.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
@@ -653,6 +654,13 @@ void ChromeBrowserMainPartsChromeos::PostProfileInit() {
 
   manager->SetState(session_manager->GetDefaultIMEState(profile()));
 
+  if (!chrome::IsRunningInMash()) {
+    // Creates PasswordEchoController before SessionManager starts so that
+    // the login screen is covered as well.
+    // TODO(xiyuan): Revisit for mash.
+    password_echo_controller_.reset(new PasswordEchoController);
+  }
+
   bool is_running_test = parameters().ui_task != nullptr;
   g_browser_process->platform_part()->InitializeSessionManager(
       parsed_command_line(), profile(), is_running_test);
@@ -842,6 +850,9 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopRun() {
   g_browser_process->platform_part()->browser_policy_connector_chromeos()->
       PreShutdown();
 
+  // Resets PasswordEchoController before ash shuts down.
+  password_echo_controller_.reset();
+
   // We first call PostMainMessageLoopRun and then destroy UserManager, because
   // Ash needs to be closed before UserManager is destroyed.
   ChromeBrowserMainPartsLinux::PostMainMessageLoopRun();