Mac fullscreen low power video: Add FullscreenLowPowerControllerCocoa

ui/accelerated_widget_mac/fullscreen_low_power_coordinator.h

Index: ui/accelerated_widget_mac/fullscreen_low_power_coordinator.h
diff --git a/ui/accelerated_widget_mac/fullscreen_low_power_coordinator.h b/ui/accelerated_widget_mac/fullscreen_low_power_coordinator.h
new file mode 100644
index 0000000000000000000000000000000000000000..d79acbf1d3d6f7e376974d79d7da955f7178627d
--- /dev/null
+++ b/ui/accelerated_widget_mac/fullscreen_low_power_coordinator.h
@@ -0,0 +1,29 @@
+// Copyright 2016 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 UI_ACCELERATED_WIDGET_MAC_FULLSCREEN_LOW_POWER_COORDINATOR_H_
+#define UI_ACCELERATED_WIDGET_MAC_FULLSCREEN_LOW_POWER_COORDINATOR_H_
+
+#include "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
+
+@class CALayer;
+
+namespace ui {
+
+class ACCELERATED_WIDGET_MAC_EXPORT FullscreenLowPowerCoordinator {
+ public:
+  // This is called whenever the AcceleratedWidgetMac gets a frame, and
+  // indicates to the FullscreenLowPowerCoordinator whether or not the low power
+  // layer has valid content for this frame.
+  virtual void SetLowPowerLayerValid(bool valid) = 0;
+
+  // This is to be called if the AcceleratedWidget is going to be deactivated
+  // or destroyed. In this call, the coordinator will call back into the

[erikchen, 2016/05/05 17:47:38]

s/will/must/?

[ccameron, 2016/05/05 19:27:18]

Done.

+  // AccleratedWidgetMac to reset its FullscreenLowPowerCoordinator.
+  virtual void WillLoseAcceleratedWidget() = 0;
+};
+
+}  // namespace ui
+
+#endif  // UI_ACCELERATED_WIDGET_MAC_FULLSCREEN_LOW_POWER_COORDINATOR_H_