Profiler-instrumentation of the startup time.

chrome/app/chrome_main_delegate.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 "chrome/app/chrome_main_delegate.h"
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/cpu.h"
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/path_service.h"
 #include "base/process/memory.h"
 #include "base/process/process_handle.h"
+#include "base/profiler/scoped_tracker.h"

[cpu_(ooo_6.6-7.5), 2015/03/16 22:16:25]

why do we need this here?

[yao, 2015/03/17 14:32:01]

Done.

 #include "base/strings/string_util.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_paths_internal.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
@@ skipping 936 matching lines @@
 }
 
 content::ContentUtilityClient*
 ChromeMainDelegate::CreateContentUtilityClient() {
 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
   return NULL;
 #else
   return g_chrome_content_utility_client.Pointer();
 #endif
 }
+
+bool ChromeMainDelegate::ShouldEnableProfilerRecording() {
+  switch (chrome::VersionInfo::GetChannel()) {
+    case chrome::VersionInfo::CHANNEL_UNKNOWN:
+    case chrome::VersionInfo::CHANNEL_CANARY:
+      return true;
+    case chrome::VersionInfo::CHANNEL_DEV:
+    case chrome::VersionInfo::CHANNEL_BETA:
+    case chrome::VersionInfo::CHANNEL_STABLE:
+    default:
+      // Don't enable instrumentation.
+      return false;
+  }
+}