Add hooks for GL_EXT_debug_marker in gpu

src/gpu/GrGpu.cpp

Index: src/gpu/GrGpu.cpp
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index 3a342b6137bcb47e7dd88c81e3d25d3b8f44db21..53dd5c4157e527e8215591eed91c25acd5e8950c 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -219,6 +219,16 @@ void GrGpu::clear(const SkIRect* rect,
     this->onClear(rect, color, canIgnoreRect);
 }
 
+void GrGpu::insertEventMarker(const char* marker) {
+    this->onInsertEventMarker(marker);
+}
+void GrGpu::pushGroupMarker(const char* marker) {
+    this->onPushGroupMarker(marker);
+}
+void GrGpu::popGroupMarker() {
+    this->onPopGroupMarker();
+}
+
 void GrGpu::forceRenderTargetFlush() {
     this->handleDirtyContext();
     this->onForceRenderTargetFlush();