Fix the user-action stats for the safe browsing interstitial so that it works in release builds.

chrome/browser/safe_browsing/safe_browsing_blocking_page.cc

 // Copyright (c) 2011 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.
 //
 // Implementation of the SafeBrowsingBlockingPage class.
 
 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
 
 #include <string>
 
@@ skipping 571 matching lines @@
 
 void SafeBrowsingBlockingPage::RecordUserAction(BlockingPageEvent event) {
   // Determine the interstitial type from the blocked resources.
   // This is the same logic that is used to actually construct the
   // page contents; we can look at the title to see which type of
   // interstitial is being displayed.
   DictionaryValue strings;
   PopulateMultipleThreatStringDictionary(&strings);
 
   string16 title;
-  DCHECK(strings.GetString("title", &title));
+  bool success = strings.GetString("title", &title);
+  DCHECK(success);
 
   std::string action = "SBInterstitial";
   if (title ==
           l10n_util::GetStringUTF16(IDS_SAFE_BROWSING_MULTI_THREAT_TITLE)) {
     action.append("Multiple");
   } else if (title ==
                  l10n_util::GetStringUTF16(IDS_SAFE_BROWSING_MALWARE_TITLE)) {
     action.append("Malware");
   } else {
     DCHECK_EQ(title,
@@ skipping 98 matching lines @@
   // Client-side phishing detection interstitials never block the main frame
   // load, since they happen after the page is finished loading.
   if (unsafe_resources[0].threat_type ==
       SafeBrowsingService::CLIENT_SIDE_PHISHING_URL) {
     return false;
   }
 
   // Otherwise, check the threat type.
   return unsafe_resources.size() == 1 && !unsafe_resources[0].is_subresource;
 }