content: Add CreateGpuMemoryBufferFromHandle to GpuMemoryBufferFactory interface.

content/common/gpu/gpu_memory_buffer_factory_io_surface.h

Index: content/common/gpu/gpu_memory_buffer_factory_io_surface.h
diff --git a/content/common/gpu/gpu_memory_buffer_factory_io_surface.h b/content/common/gpu/gpu_memory_buffer_factory_io_surface.h
index 1cafa794ccfa216616223fc16c13e28f84cbbe69..05db205fbd0df7627c458279905620c974265f82 100644
--- a/content/common/gpu/gpu_memory_buffer_factory_io_surface.h
+++ b/content/common/gpu/gpu_memory_buffer_factory_io_surface.h
@@ -47,6 +47,12 @@ class CONTENT_EXPORT GpuMemoryBufferFactoryIOSurface
       gfx::BufferUsage usage,
       int client_id,
       gfx::PluginWindowHandle surface_handle) override;
+  gfx::GpuMemoryBufferHandle CreateGpuMemoryBufferFromHandle(
+      const gfx::GpuMemoryBufferHandle& handle,
+      gfx::GpuMemoryBufferId id,
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      int client_id) override;
   void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                               int client_id) override;
   gpu::ImageFactory* AsImageFactory() override;