Add trace events to measure GPU process startup timing and time to first present.

ui/gl/gl_surface.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/gl_surface.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
+#include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/threading/thread_local.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_implementation.h"
 
 namespace gfx {
 
 namespace {
 base::LazyInstance<base::ThreadLocalPointer<GLSurface> >::Leaky
     current_surface_ = LAZY_INSTANCE_INITIALIZER;
 }  // namespace
 
 // static
 bool GLSurface::InitializeOneOff() {
   static bool initialized = false;
   if (initialized)
     return true;
 
+  TRACE_EVENT0("gpu", "GLSurface::InitializeOneOff");
+
   std::vector<GLImplementation> allowed_impls;
   GetAllowedGLImplementations(&allowed_impls);
   DCHECK(!allowed_impls.empty());
 
   // The default implementation is always the first one in list.
   GLImplementation impl = allowed_impls[0];
   bool fallback_to_osmesa = false;
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUseGL)) {
     std::string requested_implementation_name =
         CommandLine::ForCurrentProcess()->GetSwitchValueASCII(switches::kUseGL);
@@ skipping 166 matching lines @@
   return surface_->GetConfig();
 }
 
 unsigned GLSurfaceAdapter::GetFormat() {
   return surface_->GetFormat();
 }
 
 GLSurfaceAdapter::~GLSurfaceAdapter() {}
 
 }  // namespace gfx