Read the ChromeOS channel info earlier during startup.

chrome/browser/chrome_browser_main.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/browser/chrome_browser_main.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 116 matching lines @@
 #endif
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
 #include "chrome/browser/first_run/upgrade_util_linux.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/settings/cros_settings_names.h"
+#include "chrome/browser/chromeos/system/statistics_provider.h"
 #endif
 
 // TODO(port): several win-only methods have been pulled out of this, but
 // BrowserMain() as a whole needs to be broken apart so that it's usable by
 // other platforms. For now, it's just a stub. This is a serious work in
 // progress and should not be taken as an indication of a real refactoring.
 
 #if defined(OS_WIN)
 #include "base/environment.h"  // For PreRead experiment.
 #include "base/win/windows_version.h"
@@ skipping 571 matching lines @@
       status = tracked_objects::ThreadData::PROFILING_CHILDREN_ACTIVE;
     tracked_objects::ThreadData::InitializeAndSetTrackingStatus(status);
   }
 
   if (parsed_command_line().HasSwitch(switches::kProfilingOutputFile)) {
     tracking_objects_.set_output_file_path(
         parsed_command_line().GetSwitchValuePath(
             switches::kProfilingOutputFile));
   }
 
+#if defined(OS_CHROMEOS)
+  chromeos::system::StatisticsProvider::GetInstance()->Init();

[kochi, 2012/12/13 14:17:30]

Could you add a comment why the initialization of
StatisticsProvider has to be here?

[Alexei Svitkine (slow), 2012/12/13 15:45:49]

Done.

+#endif
+
   local_state_ = InitializeLocalState(local_state_task_runner,
                                       parsed_command_line(),
                                       is_first_run_);
 
   // These members must be initialized before returning from this function.
   master_prefs_.reset(new first_run::MasterPrefs);
 
 #if !defined(OS_ANDROID)
   // Android doesn't use StartupBrowserCreator.
   browser_creator_.reset(new StartupBrowserCreator);
@@ skipping 925 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }