Support using OpenGL ES context on desktop

src/gpu/gl/GrGLAssembleInterface.h

Index: src/gpu/gl/GrGLAssembleInterface.h
diff --git a/src/gpu/gl/GrGLAssembleInterface.h b/src/gpu/gl/GrGLAssembleInterface.h
index 36a4513447497e8cc065722eb28ebb54df6cc88d..4bd88367ca048d16d210edf2210c84b0b34f4919 100644
--- a/src/gpu/gl/GrGLAssembleInterface.h
+++ b/src/gpu/gl/GrGLAssembleInterface.h
@@ -16,3 +16,10 @@ typedef GrGLFuncPtr (*GrGLGetProc)(void* ctx, const char name[]);
  * get() to get each function address. ctx is a generic ptr passed to and interpreted by get().
  */
 const GrGLInterface* GrGLAssembleGLInterface(void* ctx, GrGLGetProc get);
+
+/**
+ * Generic function for creating a GrGLInterface for an OpenGL ES (but not Open GL) context. It
+ * calls get() to get each function address. ctx is a generic ptr passed to and interpreted by
+ * get().
+ */
+const GrGLInterface* GrGLAssembleGLESInterface(void* ctx, GrGLGetProc get);