Add module for counting date-last-roll-call and persisting those counts

chrome/browser/extensions/updater/chrome_update_client_config.h

Index: chrome/browser/extensions/updater/chrome_update_client_config.h
diff --git a/chrome/browser/extensions/updater/chrome_update_client_config.h b/chrome/browser/extensions/updater/chrome_update_client_config.h
index 36318c5120d179b8d5169381fdf912e9f7dcebb9..9d9cacdd1af2ea962fc9beceb9b4b00fe1e0fc92 100644
--- a/chrome/browser/extensions/updater/chrome_update_client_config.h
+++ b/chrome/browser/extensions/updater/chrome_update_client_config.h
@@ -13,6 +13,12 @@
 #include "components/component_updater/configurator_impl.h"
 #include "extensions/browser/updater/update_client_config.h"
 
+class PrefService;

[asargent_no_longer_on_chrome, 2016/04/07 23:07:25]

You should already get this from the
extensions/browser/updater/update_client_config.h include which gets it from
components/update_client/configurator.h, but it isn't that big a deal either way
(note that we don't forward declare other classes like GURL). 

[waffles, 2016/04/07 23:22:24]

Done.

+
+namespace base {
+class FilePath;
+}

[asargent_no_longer_on_chrome, 2016/04/07 23:07:25]

do you still need this FilePath declaration?

[waffles, 2016/04/07 23:22:24]

Done.

+
 namespace content {
 class BrowserContext;
 }
@@ -43,6 +49,7 @@ class ChromeUpdateClientConfig : public UpdateClientConfig {
   bool DeltasEnabled() const override;
   bool UseBackgroundDownloader() const override;
   bool UseCupSigning() const override;
+  PrefService* GetPrefService() const override;
 
  protected:
   friend class base::RefCountedThreadSafe<ChromeUpdateClientConfig>;