Add a low-frequency RAPPOR configuration, and use it for Safe Browsing and Permissions metrics.

chrome/browser/ssl/ssl_blocking_page.cc

Index: chrome/browser/ssl/ssl_blocking_page.cc
diff --git a/chrome/browser/ssl/ssl_blocking_page.cc b/chrome/browser/ssl/ssl_blocking_page.cc
index 0d275561cf6956faeaef281ff2db6b6afb0ad879..89b20db7c0d4eb01bd1282ab742a828d4e779900 100644
--- a/chrome/browser/ssl/ssl_blocking_page.cc
+++ b/chrome/browser/ssl/ssl_blocking_page.cc
@@ -61,7 +61,8 @@ enum SSLExpirationAndDecision {
 
 // Rappor prefix, which is used for both overridable and non-overridable
 // interstitials so we don't leak the "overridable" bit.
-const char kSSLRapporPrefix[] = "ssl2";
+const char kDeprecatedSSLRapporPrefix[] = "ssl2";
+const char kSSLRapporPrefix[] = "ssl3";
 
 std::string GetSamplingEventName(const bool overridable, const int cert_error) {
   std::string event_name(kEventNameBase);
@@ -142,7 +143,9 @@ SSLBlockingPage::SSLBlockingPage(
   reporting_info.metric_prefix =
       overridable_ ? "ssl_overridable" : "ssl_nonoverridable";
   reporting_info.rappor_prefix = kSSLRapporPrefix;
-  reporting_info.rappor_report_type = rappor::UMA_RAPPOR_TYPE;
+  reporting_info.deprecated_rappor_prefix = kDeprecatedSSLRapporPrefix;
+  reporting_info.rappor_report_type = rappor::LOW_FREQUENCY_UMA_RAPPOR_TYPE;
+  reporting_info.deprecated_rappor_report_type = rappor::UMA_RAPPOR_TYPE;
   ChromeMetricsHelper* chrome_metrics_helper =
       new ChromeMetricsHelper(web_contents, request_url, reporting_info,
                               GetSamplingEventName(overridable_, cert_error));