ozone: dri: add synchronous SwapBuffers support on surfaceless

ui/ozone/platform/dri/test/mock_dri_wrapper.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_TEST_MOCK_DRI_WRAPPER_H_
 #define UI_OZONE_PLATFORM_DRI_TEST_MOCK_DRI_WRAPPER_H_
 
 #include <queue>
 #include <vector>
 
@@ skipping 55 matching lines @@
                       uint32_t height,
                       uint8_t depth,
                       uint8_t bpp,
                       uint32_t stride,
                       uint32_t handle,
                       uint32_t* framebuffer) override;
   bool RemoveFramebuffer(uint32_t framebuffer) override;
   ScopedDrmFramebufferPtr GetFramebuffer(uint32_t framebuffer) override;
   bool PageFlip(uint32_t crtc_id,
                 uint32_t framebuffer,
+                bool is_sync,
                 const PageFlipCallback& callback) override;
   bool PageFlipOverlay(uint32_t crtc_id,
                        uint32_t framebuffer,
                        const gfx::Rect& location,
                        const gfx::Rect& source,
                        int overlay_plane) override;
   ScopedDrmPropertyPtr GetProperty(drmModeConnector* connector,
                                    const char* name) override;
   bool SetProperty(uint32_t connector_id,
                    uint32_t property_id,
@@ skipping 38 matching lines @@
   std::vector<skia::RefPtr<SkSurface> > buffers_;
 
   std::queue<PageFlipCallback> callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(MockDriWrapper);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_TEST_MOCK_DRI_WRAPPER_H_