Implement native GMB backbuffers in the GLES2 Command Decoder.

gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.cc

Index: gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.cc
diff --git a/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.cc b/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.cc
index d7d508cd141b15b67ec11576b2e5fe252aeec9b1..1036409a2508a5af672fda5c5dd62356494c57eb 100644
--- a/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.cc
+++ b/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.cc
@@ -94,4 +94,13 @@ GpuMemoryBufferFactorySurfaceTexture::CreateImageForGpuMemoryBuffer(
   return image;
 }
 
+scoped_refptr<gl::GLImage>
+GpuMemoryBufferFactorySurfaceTexture::CreateAnonymousImage(
+    const gfx::Size& size,
+    gfx::BufferFormat format,
+    unsigned internalformat) {
+  NOTIMPLEMENTED();
+  return nullptr;
+}
+
 }  // namespace gpu