Read the ChromeOS channel info earlier during startup.

chrome/browser/chromeos/system/statistics_provider.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_SYSTEM_STATISTICS_PROVIDER_H_
 #define CHROME_BROWSER_CHROMEOS_SYSTEM_STATISTICS_PROVIDER_H_
 
 #include <string>
 
 namespace chromeos {
 namespace system {
 
 // This interface provides access to Chrome OS statistics.
 class StatisticsProvider {
  public:
+  // Initializes the statistics provider.
+  virtual void Init() = 0;

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

If you remove this as commented in .cc file,
you don't get compilation error for MockStatisticsProvider.

[Alexei Svitkine (slow), 2012/12/13 15:16:03]

I've modified MockStatisticsProvider now. See my other comment on why I think
this is preferable.

+
   // Retrieve the named machine statistic (e.g. "hardware_class").
   // This does not update the statistcs. If the |name| is not set, |result|
   // preserves old value.
   virtual bool GetMachineStatistic(const std::string& name,
                                    std::string* result) = 0;
 
   static StatisticsProvider* GetInstance();
 
  protected:
   virtual ~StatisticsProvider() {}
 };
 
 }  // namespace system
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_STATISTICS_PROVIDER_H_