Add a mechanism for collecting Rappor samples on a daily interval.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index e86924862d3bce734a1aff1ad5272acd5904ac28..09cf2d3bbf81af7fd7915035e8a9f8bc03b6cd54 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -647,7 +647,6 @@ void ChromeBrowserMainParts::StartMetricsRecording() {
   // TODO(asvitkine): Since this function is not run on Android, RAPPOR is
   // currently disabled there. http://crbug.com/370041
   browser_process_->rappor_service()->Start(
-      browser_process_->local_state(),
       browser_process_->system_request_context(),
       metrics_enabled);
 }