Add initial support for NV_path_rendering extension to gpu command buffer

ppapi/shared_impl/ppb_opengles2_shared.cc

Index: ppapi/shared_impl/ppb_opengles2_shared.cc
diff --git a/ppapi/shared_impl/ppb_opengles2_shared.cc b/ppapi/shared_impl/ppb_opengles2_shared.cc
index 00cb2ed2f4d57f9df1a19c0f3732794d8401cc61..191965d9445c78e9bf22137c698a442d015748c7 100644
--- a/ppapi/shared_impl/ppb_opengles2_shared.cc
+++ b/ppapi/shared_impl/ppb_opengles2_shared.cc
@@ -1573,6 +1573,13 @@ void DrawBuffersEXT(PP_Resource context_id, GLsizei count, const GLenum* bufs) {
   }
 }
 
+void LoadIdentity(PP_Resource context_id) {
+  Enter3D enter(context_id, true);
+  if (enter.succeeded()) {
+    ToGles2Impl(&enter)->LoadIdentity();
+  }
+}
+
 }  // namespace
 const PPB_OpenGLES2* PPB_OpenGLES2_Shared::GetInterface() {
   static const struct PPB_OpenGLES2 ppb_opengles2 = {
@@ -1646,7 +1653,8 @@ const PPB_OpenGLES2* PPB_OpenGLES2_Shared::GetInterface() {
       &VertexAttrib2f,                      &VertexAttrib2fv,
       &VertexAttrib3f,                      &VertexAttrib3fv,
       &VertexAttrib4f,                      &VertexAttrib4fv,
-      &VertexAttribPointer,                 &Viewport};
+      &VertexAttribPointer,                 &Viewport,
+      &LoadIdentity};
   return &ppb_opengles2;
 }
 const PPB_OpenGLES2InstancedArrays*