Turn on component updater on chromeos, only for the pnacl component.

chrome/browser/profiles/profile_manager.h

Index: chrome/browser/profiles/profile_manager.h
diff --git a/chrome/browser/profiles/profile_manager.h b/chrome/browser/profiles/profile_manager.h
index 71139bc225fb49fe66b2a92ea2cdbdc614bd99d3..a0d1262d04c77dc7828a81c85d96b4d501604975 100644
--- a/chrome/browser/profiles/profile_manager.h
+++ b/chrome/browser/profiles/profile_manager.h
@@ -216,6 +216,9 @@ class ProfileManager : public base::NonThreadSafe,
 
   const base::FilePath& user_data_dir() const { return user_data_dir_; }
 
+  // For ChromeOS, determines if the user has logged in to a real profile.
+  bool IsLoggedIn() const { return logged_in_; }
+
  protected:
   // Does final initial actions.
   virtual void DoFinalInit(Profile* profile, bool go_off_the_record);