Added incident report for variations seed signature mismatch.

chrome/browser/metrics/variations/variations_seed_store.cc

Index: chrome/browser/metrics/variations/variations_seed_store.cc
diff --git a/chrome/browser/metrics/variations/variations_seed_store.cc b/chrome/browser/metrics/variations/variations_seed_store.cc
index be775309989c3c1b3aef14a3ec04b1df0458414e..e5457d1d23f17a91f6bf222515f2b707329b545c 100644
--- a/chrome/browser/metrics/variations/variations_seed_store.cc
+++ b/chrome/browser/metrics/variations/variations_seed_store.cc
@@ -10,6 +10,7 @@
 #include "base/prefs/pref_service.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
+#include "chrome/browser/browser_process.h"

[grt (UTC plus 2), 2014/10/14 01:28:30]

unused

[Georges Khalil, 2014/10/14 13:51:09]

Done.

 #include "chrome/common/pref_names.h"
 #include "components/variations/proto/variations_seed.pb.h"
 #include "crypto/signature_verifier.h"
@@ -120,6 +121,8 @@ VariationsSeedStore::~VariationsSeedStore() {
 }
 
 bool VariationsSeedStore::LoadSeed(variations::VariationsSeed* seed) {
+  invalid_signature_.clear();
+  is_invalid_signature_ = false;
   const std::string base64_seed_data =
       local_state_->GetString(prefs::kVariationsSeed);
   if (base64_seed_data.empty()) {
@@ -150,6 +153,9 @@ bool VariationsSeedStore::LoadSeed(variations::VariationsSeed* seed) {
               << "with result: " << result << ". Clearing the pref.";
       ClearPrefs();
       RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_INVALID_SIGNATURE);
+      // Record the invalid signature.
+      is_invalid_signature_ = true;
+      invalid_signature_ = base64_seed_signature;
       return false;
     }
   }
@@ -272,4 +278,13 @@ VariationsSeedStore::VerifySeedSignature(
   return VARIATIONS_SEED_SIGNATURE_INVALID_SEED;
 }
 
+bool VariationsSeedStore::GetInvalidSignature(
+    std::string* invalid_signature) const {
+  if (!is_invalid_signature_) {
+    return false;
+  }
+  *invalid_signature = invalid_signature_;
+  return true;
+}
+
 }  // namespace chrome_variations