gpu: Use decoder state restoration for scoped_binders

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 6fb3faedb45e9143ac7acb69278d480f448bd20b..86fb165ee008f233ab808ba1efe962a14c9d3773 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -557,6 +557,9 @@ class GLES2DecoderImpl : public GLES2Decoder, public ErrorStateClient {
   void RestoreTextureUnitBindings(unsigned unit) const override {
     state_.RestoreTextureUnitBindings(unit, NULL);
   }
+  void RestoreVertexAttribArray(unsigned index) const override {
+    state_.RestoreVertexAttribArray(index);
+  }
   void RestoreFramebufferBindings() const override;
   void RestoreRenderbufferBindings() override;
   void RestoreTextureState(unsigned service_id) const override;