Adding mojo calls for several lock screen related operations.

chrome/browser/chromeos/login/lock/views_screen_locker.h

Index: chrome/browser/chromeos/login/lock/views_screen_locker.h
diff --git a/chrome/browser/chromeos/login/lock/views_screen_locker.h b/chrome/browser/chromeos/login/lock/views_screen_locker.h
index 35dc235dcae1970e60b4f30b499657504577abd2..3aad0f07c5fc13407015ed0fa24f44bca533f3b3 100644
--- a/chrome/browser/chromeos/login/lock/views_screen_locker.h
+++ b/chrome/browser/chromeos/login/lock/views_screen_locker.h
@@ -7,7 +7,9 @@
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
+#include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/ui/ash/lock_screen_client.h"
+#include "chromeos/dbus/power_manager_client.h"
 
 namespace chromeos {
 
@@ -19,7 +21,8 @@ class UserSelectionScreenProxy;
 // It is also a ScreenLocker::Delegate which handles calls from chrome into
 // ash (views-based lockscreen).
 class ViewsScreenLocker : public LockScreenClient::Delegate,
-                          public ScreenLocker::Delegate {
+                          public ScreenLocker::Delegate,
+                          public PowerManagerClient::Observer {
  public:
   explicit ViewsScreenLocker(ScreenLocker* screen_locker);
   ~ViewsScreenLocker() override;
@@ -43,9 +46,20 @@ class ViewsScreenLocker : public LockScreenClient::Delegate,
 
  private:
   // LockScreenClient::Delegate
+  void HandleAuthenticateUser(const AccountId& account_id,
+                              const std::string& hashed_password,
+                              bool authenticated_by_pin) override;
   void HandleAttemptUnlock(const AccountId& account_id) override;
   void HandleHardlockPod(const AccountId& account_id) override;
   void HandleRecordClickOnLockIcon(const AccountId& account_id) override;
+  void HandleFocusPod(const AccountId& account_id) override;
+  void HandleNoPodFocused() override;
+
+  // PowerManagerClient::Observer:
+  void SuspendDone(const base::TimeDelta& sleep_duration) override;
+
+  void UpdatePinKeyboardState(const AccountId& account_id);

[jdufault, 2017/06/08 21:12:06]

These methods should go above the overrides.

[xiaoyinh(OOO Sep 11-29), 2017/06/09 00:47:11]

Done.

+  void OnAllowedInputMethodsChanged();
 
   std::unique_ptr<UserSelectionScreenProxy> user_selection_screen_proxy_;
   std::unique_ptr<UserSelectionScreen> user_selection_screen_;
@@ -56,6 +70,16 @@ class ViewsScreenLocker : public LockScreenClient::Delegate,
   // Time when lock was initiated, required for metrics.
   base::TimeTicks lock_time_;
 
+  std::unique_ptr<AccountId> focused_pod_account_id_;

[jdufault, 2017/06/08 21:12:06]

base::Optional

 - avoids heap allocation
 - I'm guessing it conveys intent more accurately

[xiaoyinh(OOO Sep 11-29), 2017/06/09 00:47:11]

Done.

+
+  // Input Method Engine state used at lock screen.
+  scoped_refptr<input_method::InputMethodManager::State> ime_state_;
+
+  std::unique_ptr<CrosSettings::ObserverSubscription>
+      allowed_input_methods_subscription_;
+
+  bool lock_screen_ready_ = false;
+
   base::WeakPtrFactory<ViewsScreenLocker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewsScreenLocker);