Add hooks for GL_EXT_debug_marker in gpu

src/gpu/gl/GrGLCreateNullInterface.cpp

Index: src/gpu/gl/GrGLCreateNullInterface.cpp
diff --git a/src/gpu/gl/GrGLCreateNullInterface.cpp b/src/gpu/gl/GrGLCreateNullInterface.cpp
index 105fb0b604478fb30a6dfcfc748f09ab39caa6d8..fa404ce090c1da38eb437022a2f355a5855e0c22 100644
--- a/src/gpu/gl/GrGLCreateNullInterface.cpp
+++ b/src/gpu/gl/GrGLCreateNullInterface.cpp
@@ -335,12 +335,15 @@ const GrGLInterface* GrGLCreateNullInterface() {
         functions->fGetStringi = noOpGLGetStringi;
         functions->fGetTexLevelParameteriv = noOpGLGetTexLevelParameteriv;
         functions->fGetUniformLocation = noOpGLGetUniformLocation;
+        functions->fInsertEventMarker = noOpGLInsertEventMarker;
         functions->fLoadIdentity = noOpGLLoadIdentity;
         functions->fLoadMatrixf = noOpGLLoadMatrixf;
         functions->fLineWidth = noOpGLLineWidth;
         functions->fLinkProgram = noOpGLLinkProgram;
         functions->fMatrixMode = noOpGLMatrixMode;
         functions->fPixelStorei = nullGLPixelStorei;
+        functions->fPopGroupMarker = noOpGLPopGroupMarker;
+        functions->fPushGroupMarker = noOpGLPushGroupMarker;
         functions->fQueryCounter = noOpGLQueryCounter;
         functions->fReadBuffer = noOpGLReadBuffer;
         functions->fReadPixels = nullGLReadPixels;