Trigger the SW reporter to run once a week for users with UMA enabled.

chrome/browser/metrics/chrome_metrics_service_accessor.h

Index: chrome/browser/metrics/chrome_metrics_service_accessor.h
diff --git a/chrome/browser/metrics/chrome_metrics_service_accessor.h b/chrome/browser/metrics/chrome_metrics_service_accessor.h
index 37b02853bc221091c3fff69856456d1adb5749f1..1b97d547a8c11073ad566936ece55f854a6da312 100644
--- a/chrome/browser/metrics/chrome_metrics_service_accessor.h
+++ b/chrome/browser/metrics/chrome_metrics_service_accessor.h
@@ -13,6 +13,8 @@
 #include "chrome/browser/metrics/metrics_service_accessor.h"
 
 class ChromeBrowserMetricsServiceObserver;
+class ComponentUpdateService;
+class PrefService;
 class Profile;
 
 namespace {
@@ -20,6 +22,11 @@ class CrashesDOMHandler;
 class FlashDOMHandler;
 }
 
+namespace component_updater {
+void ExecuteSwReporterIfRequired(ComponentUpdateService* cus,
+                                 PrefService* prefs);
+}
+
 namespace extensions {
 class ExtensionDownloader;
 class ManifestFetchData;
@@ -39,6 +46,9 @@ class ChromeInternalLogSource;
 // as a 'friend' below.
 class ChromeMetricsServiceAccessor : public MetricsServiceAccessor {
  private:
+  friend void component_updater::ExecuteSwReporterIfRequired(
+      ComponentUpdateService* cus,
+      PrefService* prefs);
   friend bool prerender::IsOmniboxEnabled(Profile* profile);
   friend class ::ChromeBrowserMetricsServiceObserver;
   friend class ChromeRenderMessageFilter;