Add UMA metric for GetHash parsing errors.

chrome/browser/safe_browsing/protocol_manager_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 
 #include <vector>
 
 #include "base/base64.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
@@ skipping 435 matching lines @@
 
   std::vector<SBFullHashResult> full_hashes;
   base::TimeDelta cache_lifetime;
   pm->ParseV4HashResponse(res_data, &full_hashes, &cache_lifetime);
 
   EXPECT_EQ(base::TimeDelta::FromSeconds(600), cache_lifetime);
   // THere should be no hash results.
   EXPECT_EQ(0ul, full_hashes.size());
 }
 
-// Adds an entry with an SOCIAL_ENGINEERING threat type.
+// Adds an entry with a SOCIAL_ENGINEERING threat type.
 TEST_F(SafeBrowsingProtocolManagerTest,
     TestParseV4HashResponseSocialEngineeringThreatType) {
   scoped_ptr<SafeBrowsingProtocolManager> pm(CreateProtocolManager(NULL));
 
   FindFullHashesResponse res;
   res.mutable_negative_cache_duration()->set_seconds(600);
   ThreatMatch* m = res.add_matches();
   m->set_threat_type(SOCIAL_ENGINEERING);
   m->set_platform_type(CHROME_PLATFORM);
   m->set_threat_entry_type(URL_EXPRESSION);
@@ skipping 910 matching lines @@
 
   EXPECT_FALSE(pm->IsUpdateScheduled());
 
   // Invoke the AddChunksCallback to finish the update.
   runner->RunPendingTasks();
 
   EXPECT_TRUE(pm->IsUpdateScheduled());
 }
 
 }  // namespace safe_browsing