[Ozone-Dri] Allocate cursor buffers on the correct DRM device

ui/ozone/platform/dri/dri_window_delegate_impl.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_DRI_DRI_WINDOW_DELEGATE_IMPL_H_
 #define UI_OZONE_PLATFORM_DRI_DRI_WINDOW_DELEGATE_IMPL_H_
 
 #include "base/timer/timer.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 36 matching lines @@
 
  private:
   // Draw the last set cursor & update the cursor plane.
   void ResetCursor(bool bitmap_only);
 
   // Draw next frame in an animated cursor.
   void OnCursorAnimationTimeout();
 
   void UpdateWidgetToDrmDeviceMapping();
 
+  // When |controller_| changes this is called to reallocate the cursor buffers
+  // since the allocation DRM device may have changed.
+  void UpdateCursorBuffers();
+
   gfx::AcceleratedWidget widget_;
 
   DrmDeviceManager* device_manager_;          // Not owned.
   ScreenManager* screen_manager_;             // Not owned.
 
   // The current bounds of the window.
   gfx::Rect bounds_;
 
   // The controller associated with the current window. This may be nullptr if
   // the window isn't over an active display.
   HardwareDisplayController* controller_;
 
   base::RepeatingTimer<DriWindowDelegateImpl> cursor_timer_;
 
   scoped_refptr<DriBuffer> cursor_buffers_[2];
   int cursor_frontbuffer_;
 
   std::vector<SkBitmap> cursor_bitmaps_;
   gfx::Point cursor_location_;
   int cursor_frame_;
   int cursor_frame_delay_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(DriWindowDelegateImpl);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_DRI_WINDOW_DELEGATE_IMPL_H_