ozone: Add overlay candidate implementation that queries support via IPC

ui/ozone/platform/drm/gpu/drm_window.h

 // Copyright 2014 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_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_H_
 
 #include <vector>
 
 #include "base/timer/timer.h"
@@ skipping 11 matching lines @@
 namespace gfx {
 class Point;
 class Rect;
 }  // namespace gfx
 
 namespace ui {
 
 class DrmBuffer;
 class DrmDeviceManager;
 class HardwareDisplayController;
+struct OverlayCheck_Params;
+class ScanoutBufferGenerator;
 class ScreenManager;
 
 // A delegate of the platform window (DrmWindow) on the GPU process. This is
 // used to keep track of window state changes such that each platform window is
 // correctly associated with a display.
 // A window is associated with the display whose bounds contains the window
 // bounds. If there's no suitable display, the window is disconnected and its
 // contents will not be visible.
 class OZONE_EXPORT DrmWindow {
  public:
@@ skipping 35 matching lines @@
   // Move the HW cursor to the specified location.
   void MoveCursor(const gfx::Point& location);
 
   // Queue overlay planes and page flips.
   // If hardware display controller is available, forward the information
   // immediately, otherwise queue up on the window and forward when the hardware
   // is once again ready.
   void QueueOverlayPlane(const OverlayPlane& plane);
 
   bool SchedulePageFlip(bool is_sync, const SwapCompletionCallback& callback);
+  bool TestPageFlip(const std::vector<OverlayCheck_Params>& planes,
+                    ScanoutBufferGenerator* buffer_generator);
 
   // Returns the last buffer associated with this window.
   const OverlayPlane* GetLastModesetBuffer();
 
  private:
   // Draw the last set cursor & update the cursor plane.
   void ResetCursor(bool bitmap_only);
 
   // Draw next frame in an animated cursor.
   void OnCursorAnimationTimeout();
@@ skipping 29 matching lines @@
   OverlayPlaneList pending_planes_;
   OverlayPlaneList last_submitted_planes_;
   bool last_swap_sync_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmWindow);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_H_