Introduce MetricsServiceClient::StartGatheringMetrics

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 580aa13ccb6b7425c5c8487da941625ff4d67c39..b1c161d5bc73eb918639b7f7ab97953ccbd20507 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/metrics/chrome_metrics_service_client.h"
 
 #include "base/bind.h"
+#include "base/callback.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ -282,3 +283,9 @@ void ChromeMetricsServiceClient::Observe(
       NOTREACHED();
   }
 }
+
+void ChromeMetricsServiceClient::StartGatheringMetrics(
+    const base::Closure& done_callback) {
+  // TODO(blundell): Move metrics gathering tasks from MetricsService to here.
+  done_callback.Run();
+}