cc: Partial draw without partial swap support.

services/ui/surfaces/display_output_surface.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 SERVICES_UI_SURFACES_DISPLAY_OUTPUT_SURFACE_H_
 #define SERVICES_UI_SURFACES_DISPLAY_OUTPUT_SURFACE_H_
 
 #include <memory>
 
 #include "cc/output/in_process_context_provider.h"
@@ skipping 26 matching lines @@
                bool has_alpha,
                bool use_stencil) override;
   void SwapBuffers(cc::OutputSurfaceFrame frame) override;
   uint32_t GetFramebufferCopyTextureFormat() override;
   cc::OverlayCandidateValidator* GetOverlayCandidateValidator() const override;
   bool IsDisplayedAsOverlayPlane() const override;
   unsigned GetOverlayTextureId() const override;
   bool SurfaceIsSuspendForRecycle() const override;
   bool HasExternalStencilTest() const override;
   void ApplyExternalStencil() override;
+  bool CanPartialDraw(const gfx::Rect& damage) override;
 
  protected:
   cc::OutputSurfaceClient* client() const { return client_; }
 
   // Called when a swap completion is signaled from ImageTransportSurface.
   virtual void DidReceiveSwapBuffersAck(gfx::SwapResult result);
 
  private:
   // Called when a swap completion is signaled from ImageTransportSurface.
   void OnGpuSwapBuffersCompleted(
       const std::vector<ui::LatencyInfo>& latency_info,
       gfx::SwapResult result,
       const gpu::GpuProcessHostedCALayerTreeParamsMac* params_mac);
   void OnVSyncParametersUpdated(base::TimeTicks timebase,
                                 base::TimeDelta interval);
 
   cc::OutputSurfaceClient* client_ = nullptr;
   cc::SyntheticBeginFrameSource* const synthetic_begin_frame_source_;
   bool set_draw_rectangle_for_frame_ = false;
   // True if the draw rectangle has been set at all since the last resize.
   bool has_set_draw_rectangle_since_last_resize_ = false;
   gfx::Size size_;
 
   base::WeakPtrFactory<DisplayOutputSurface> weak_ptr_factory_;
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_SURFACES_DISPLAY_OUTPUT_SURFACE_H_