Adding ArcBridge interface for synchronizing brightness settings

components/arc/power/arc_power_bridge.h

Index: components/arc/power/arc_power_bridge.h
diff --git a/components/arc/power/arc_power_bridge.h b/components/arc/power/arc_power_bridge.h
index c459cffbb07d22b9066368ff692ff99dfba014c3..ff163f7fc10ee8d7ad6575771f45c802767a27d1 100644
--- a/components/arc/power/arc_power_bridge.h
+++ b/components/arc/power/arc_power_bridge.h
@@ -41,10 +41,15 @@ class ArcPowerBridge : public ArcService,
   // DisplayConfigurator::Observer overrides.
   void OnPowerStateChanged(chromeos::DisplayPowerState power_state) override;
 
+  // PowerManagerClient::Observer overrides.
+  void NotifyBrightnessChange(double percent) override;

[Muyuan, 2017/04/05 18:41:11]

Just override BrightnessChanged.

[yueli, 2017/04/05 19:59:47]

Done.

+
   // mojom::PowerHost overrides.
   void OnAcquireDisplayWakeLock(mojom::DisplayWakeLockType type) override;
   void OnReleaseDisplayWakeLock(mojom::DisplayWakeLockType type) override;
   void IsDisplayOn(const IsDisplayOnCallback& callback) override;
+  void SetBrightness(int32_t brightness) override;
+  void SyncBrightness() override;
 
  private:
   void ReleaseAllDisplayWakeLocks();