Adding ArcBridge interface for synchronizing brightness settings

components/arc/power/arc_power_bridge.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_ARC_POWER_ARC_POWER_BRIDGE_H_
 #define COMPONENTS_ARC_POWER_ARC_POWER_BRIDGE_H_
 
 #include <map>
 
 #include "base/macros.h"
@@ skipping 23 matching lines @@
   void OnInstanceReady() override;
   void OnInstanceClosed() override;
 
   // chromeos::PowerManagerClient::Observer overrides.
   void SuspendImminent() override;
   void SuspendDone(const base::TimeDelta& sleep_duration) override;
 
   // 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();
 
   mojo::Binding<mojom::PowerHost> binding_;
 
   // Stores a mapping of type -> wake lock ID for all wake locks
   // held by ARC.
   std::multimap<mojom::DisplayWakeLockType, int> wake_locks_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcPowerBridge);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_POWER_ARC_POWER_BRIDGE_H_