Support swap damage rect using eglSwapBuffersWithDamageKHR

ui/gl/gl_surface_egl.h

 // Copyright (c) 2012 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_GL_GL_SURFACE_EGL_H_
 #define UI_GL_GL_SURFACE_EGL_H_
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
@@ skipping 78 matching lines @@
   bool Initialize(GLSurface::Format format) override;
   void Destroy() override;
   bool Resize(const gfx::Size& size,
               float scale_factor,
               bool has_alpha) override;
   bool Recreate() override;
   bool IsOffscreen() override;
   gfx::SwapResult SwapBuffers() override;
   gfx::Size GetSize() override;
   EGLSurface GetHandle() override;
+  bool SupportsSwapBuffersWithDamage() override;
   bool SupportsPostSubBuffer() override;
+  gfx::SwapResult SwapBuffersWithDamage(int x,
+                                        int y,
+                                        int width,
+                                        int height) override;
   gfx::SwapResult PostSubBuffer(int x, int y, int width, int height) override;
   bool SupportsCommitOverlayPlanes() override;
   gfx::SwapResult CommitOverlayPlanes() override;
   gfx::VSyncProvider* GetVSyncProvider() override;
   bool ScheduleOverlayPlane(int z_order,
                             gfx::OverlayTransform transform,
                             GLImage* image,
                             const gfx::Rect& bounds_rect,
                             const gfx::RectF& crop_rect) override;
   bool FlipsVertically() const override;
@@ skipping 16 matching lines @@
   void OnSetSwapInterval(int interval) override;
 
  private:
   // Commit the |pending_overlays_| and clear the vector. Returns false if any
   // fail to be committed.
   bool CommitAndClearPendingOverlays();
   void UpdateSwapInterval();
 
   EGLSurface surface_;
   bool supports_post_sub_buffer_;
+  bool supports_swap_buffer_with_damage_;
   bool flips_vertically_;
 
   std::unique_ptr<gfx::VSyncProvider> vsync_provider_;
 
   int swap_interval_;
 
   std::vector<GLSurfaceOverlay> pending_overlays_;
 
 #if defined(OS_WIN)
   bool vsync_override_;
@@ skipping 60 matching lines @@
   ~SurfacelessEGL() override;
 
  private:
   gfx::Size size_;
   DISALLOW_COPY_AND_ASSIGN(SurfacelessEGL);
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_SURFACE_EGL_H_