WIP: Plumbing input event latency reporting through Mus GPU.

ui/gl/gl_surface.cc

Index: ui/gl/gl_surface.cc
diff --git a/ui/gl/gl_surface.cc b/ui/gl/gl_surface.cc
index 85c3234247416546cf98220dd98e271d14b22d55..7e1979ebf2c5dc3c6fb67f08cb50bdc34436dc6b 100644
--- a/ui/gl/gl_surface.cc
+++ b/ui/gl/gl_surface.cc
@@ -214,7 +214,9 @@ bool GLSurface::ExtensionsContain(const char* c_extensions, const char* name) {
 void GLSurface::OnSetSwapInterval(int interval) {
 }
 
-GLSurfaceAdapter::GLSurfaceAdapter(GLSurface* surface) : surface_(surface) {}
+GLSurfaceAdapter::GLSurfaceAdapter(GLSurface* surface) : surface_(surface) {
+  LOG(ERROR) << "GLSurfaceAdapter ctor";
+}
 
 bool GLSurfaceAdapter::Initialize(GLSurfaceFormat format) {
   return surface_->Initialize(format);