gpu: Pepper3DImageChromium support on ChromeOS.

gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h

Index: gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
diff --git a/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h b/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
index 5a132bbdaeb4ac839d8eca08362c430a067e11f8..45be7524496504fba0325cb085e2de543a1cdbf0 100644
--- a/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
+++ b/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
@@ -49,6 +49,11 @@ class GPU_EXPORT GpuMemoryBufferFactoryOzoneNativePixmap
       unsigned internalformat,
       int client_id,
       SurfaceHandle surface_handle) override;
+  scoped_refptr<gl::GLImage> CreateAnonymousImage(
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      unsigned internalformat) override;
+  unsigned RequiredTextureType() override;
 
  private:
   using NativePixmapMapKey = std::pair<int, int>;