Add ShareGroup to GLES2Implemenation

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc
index 01c14dcc25942b6008ca038c490071ffa986e498..33e972563eed34f06bf43b7a24933ec69cd906ac 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc
+++ b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc
@@ -220,6 +220,7 @@ bool PluginGraphics3D::InitFromBrowserResource(PP_Resource res) {
       transfer_buffer_.reset(new gpu::TransferBuffer(gles2_helper_.get()));
       gles2_implementation_.reset(new gpu::gles2::GLES2Implementation(
         gles2_helper_.get(),
+        NULL,
         transfer_buffer_.get(),
         false,
         true));