cros: Bind password echo with TouchView mode

chrome/browser/chromeos/chrome_browser_main_chromeos.h

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.h
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.h b/chrome/browser/chromeos/chrome_browser_main_chromeos.h
index f45f725170a6c31a2a5a6f20e7eb3c6c1ac67920..d11e7f5161168ed7cf2c84b71e833a91815eb24a 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.h
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.h
@@ -30,6 +30,7 @@ class IdleActionWarningObserver;
 class LoginLockStateNotifier;
 class LowDiskNotification;
 class MagnificationManager;
+class PasswordEchoController;
 class PeripheralBatteryObserver;
 class PowerPrefs;
 class RendererFreezer;
@@ -88,6 +89,8 @@ class ChromeBrowserMainPartsChromeos : public ChromeBrowserMainPartsLinux {
 
   std::unique_ptr<LowDiskNotification> low_disk_notification_;
 
+  std::unique_ptr<PasswordEchoController> password_echo_controller_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsChromeos);
 };