Adding logging of offstore extensions state to user metrics.

chrome/browser/metrics/chrome_metrics_service_client.cc

Index: chrome/browser/metrics/chrome_metrics_service_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.cc b/chrome/browser/metrics/chrome_metrics_service_client.cc
index bdac4fcbde62df5f2e35e506de11135f3def87e4..2381b41fa4bd52c480812871e6ab8ae66f287172 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -281,9 +281,11 @@ void ChromeMetricsServiceClient::Initialize() {
       metrics_state_manager_, this, g_browser_process->local_state()));
 
   // Register metrics providers.
+#if defined(ENABLE_EXTENSIONS)

[Alexei Svitkine (slow), 2014/08/13 20:30:30]

Can you ifdef the header inclusion too?

[jwd, 2014/08/13 20:36:32]

Done.

   metrics_service_->RegisterMetricsProvider(
       scoped_ptr<metrics::MetricsProvider>(
           new ExtensionsMetricsProvider(metrics_state_manager_)));
+#endif
   metrics_service_->RegisterMetricsProvider(
       scoped_ptr<metrics::MetricsProvider>(new NetworkMetricsProvider));
   metrics_service_->RegisterMetricsProvider(