Add ArcAuthService to handle IPC request from ARC

components/arc/arc_bridge_service.h

Index: components/arc/arc_bridge_service.h
diff --git a/components/arc/arc_bridge_service.h b/components/arc/arc_bridge_service.h
index 1f54b7e295dac4f53ad0690422bc9a0b482a46cd..a371cce25efd647d72a63df68dc65318f89935e5 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -77,6 +77,10 @@ class ArcBridgeService : public ArcBridgeHost {
     virtual void OnAppInstanceReady() {}
     virtual void OnAppInstanceClosed() {}
 
+    // Called whenever the ARC auth interface state changes.
+    virtual void OnAuthInstanceReady() {}
+    virtual void OnAuthInstanceClosed() {}
+
     // Called whenever the ARC input interface state changes.
     virtual void OnInputInstanceReady() {}
     virtual void OnInputInstanceClosed() {}
@@ -135,6 +139,7 @@ class ArcBridgeService : public ArcBridgeHost {
   // you want to be notified when this is ready. This can only be called on the
   // thread that this class was created on.
   AppInstance* app_instance() { return app_ptr_.get(); }
+  AuthInstance* auth_instance() { return auth_ptr_.get(); }
   InputInstance* input_instance() { return input_ptr_.get(); }
   NotificationsInstance* notifications_instance() {
     return notifications_ptr_.get();
@@ -144,6 +149,7 @@ class ArcBridgeService : public ArcBridgeHost {
   SettingsInstance* settings_instance() { return settings_ptr_.get(); }
 
   int32_t app_version() const { return app_ptr_.version(); }
+  int32_t auth_version() const { return auth_ptr_.version(); }
   int32_t input_version() const { return input_ptr_.version(); }
   int32_t notifications_version() const { return notifications_ptr_.version(); }
   int32_t power_version() const { return power_ptr_.version(); }
@@ -152,6 +158,7 @@ class ArcBridgeService : public ArcBridgeHost {
 
   // ArcHost:
   void OnAppInstanceReady(AppInstancePtr app_ptr) override;
+  void OnAuthInstanceReady(AuthInstancePtr auth_ptr) override;
   void OnInputInstanceReady(InputInstancePtr input_ptr) override;
   void OnNotificationsInstanceReady(
       NotificationsInstancePtr notifications_ptr) override;
@@ -190,6 +197,7 @@ class ArcBridgeService : public ArcBridgeHost {
 
   // Called when one of the individual channels is closed.
   void CloseAppChannel();
+  void CloseAuthChannel();
   void CloseInputChannel();
   void CloseNotificationsChannel();
   void ClosePowerChannel();
@@ -198,6 +206,7 @@ class ArcBridgeService : public ArcBridgeHost {
 
   // Callbacks for QueryVersion.
   void OnAppVersionReady(int32_t version);
+  void OnAuthVersionReady(int32_t version);
   void OnInputVersionReady(int32_t version);
   void OnNotificationsVersionReady(int32_t version);
   void OnPowerVersionReady(int32_t version);
@@ -206,6 +215,7 @@ class ArcBridgeService : public ArcBridgeHost {
 
   // Mojo interfaces.
   AppInstancePtr app_ptr_;
+  AuthInstancePtr auth_ptr_;
   InputInstancePtr input_ptr_;
   NotificationsInstancePtr notifications_ptr_;
   PowerInstancePtr power_ptr_;
@@ -219,6 +229,7 @@ class ArcBridgeService : public ArcBridgeHost {
   // To keep the xxx_instance() functions being trivial, store the instance
   // pointer in a temporary variable to avoid losing its reference.
   AppInstancePtr temporary_app_ptr_;
+  AuthInstancePtr temporary_auth_ptr_;
   InputInstancePtr temporary_input_ptr_;
   NotificationsInstancePtr temporary_notifications_ptr_;
   PowerInstancePtr temporary_power_ptr_;