gl: Add YVU_420 support to GLImageOzoneNativePixmap.

ui/ozone/platform/cast/surface_factory_cast.cc

 // Copyright 2015 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.
 
 #include "ui/ozone/platform/cast/surface_factory_cast.h"
 
 #include <EGL/egl.h>
 #include <dlfcn.h>
 
 #include <utility>
@@ skipping 236 matching lines @@
     gfx::BufferUsage usage) {
   class CastPixmap : public NativePixmap {
    public:
     CastPixmap(SurfaceFactoryCast* parent) : parent_(parent) {}
 
     void* GetEGLClientBuffer() const override {
       // TODO(halliwell): try to implement this through CastEglPlatform.
       return nullptr;
     }
     bool AreDmaBufFdsValid() const override { return false; }
+    size_t GetDmaBufFdNum() const override { return 0; };

[dnicoara, 2016/06/09 01:17:02]

nit: Last semicolon isn't needed.

[Daniele Castagna, 2016/06/09 01:27:58]

Done.

     int GetDmaBufFd(size_t plane) const override { return -1; }
     int GetDmaBufPitch(size_t plane) const override { return 0; }
     int GetDmaBufOffset(size_t plane) const override { return 0; }
     gfx::BufferFormat GetBufferFormat() const override {
       return gfx::BufferFormat::BGRA_8888;
     }
     gfx::Size GetBufferSize() const override { return gfx::Size(); }
 
     bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                               int plane_z_order,
@@ skipping 36 matching lines @@
     return false;
   }
 
   set_gl_get_proc_address.Run(gl_proc);
   add_gl_library.Run(lib_egl);
   add_gl_library.Run(lib_gles2);
   return true;
 }
 
 }  // namespace ui