Update from https://crrev.com/318214

ui/gl/gl_context.cc

Index: ui/gl/gl_context.cc
diff --git a/ui/gl/gl_context.cc b/ui/gl/gl_context.cc
index 720e8e23513c534efe37bea129a11d5fd4831c52..dd8aa266f5081559b0189a8a6a41fb76736e5f98 100644
--- a/ui/gl/gl_context.cc
+++ b/ui/gl/gl_context.cc
@@ -15,6 +15,7 @@
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/gl/gl_version_info.h"
+#include "ui/gl/gpu_timing.h"
 
 namespace gfx {
 
@@ -212,6 +213,13 @@ void GLContext::SetRealGLApi() {
 GLContextReal::GLContextReal(GLShareGroup* share_group)
     : GLContext(share_group) {}
 
+scoped_refptr<gfx::GPUTimingClient> GLContextReal::CreateGPUTimingClient() {
+  if (!gpu_timing_) {
+    gpu_timing_.reset(new gfx::GPUTiming(this));
+  }
+  return gpu_timing_->CreateGPUTimingClient();
+}
+
 GLContextReal::~GLContextReal() {}
 
 void GLContextReal::SetCurrent(GLSurface* surface) {