Enforce variations signature verification.

chrome/browser/metrics/variations/variations_service.cc

Index: chrome/browser/metrics/variations/variations_service.cc
===================================================================
--- chrome/browser/metrics/variations/variations_service.cc	(revision 255631)
+++ chrome/browser/metrics/variations/variations_service.cc	(working copy)
@@ -372,6 +372,13 @@
   last_request_started_time_ = now;
 }
 
+void VariationsService::StoreSeed(const std::string& seed_data,
+                                  const std::string& seed_signature,
+                                  const base::Time& date_fetched) {
+  if (seed_store_.StoreSeedData(seed_data, seed_signature, date_fetched))
+    RecordLastFetchTime();
+}
+
 void VariationsService::FetchVariationsSeed() {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 
@@ -452,8 +459,7 @@
   request->GetResponseHeaders()->EnumerateHeader(NULL,
                                                  "X-Seed-Signature",
                                                  &seed_signature);
-  if (seed_store_.StoreSeedData(seed_data, seed_signature, response_date))
-    RecordLastFetchTime();
+  StoreSeed(seed_data, seed_signature, response_date);
 }
 
 void VariationsService::OnResourceRequestsAllowed() {