Add backup URL support for SafeBrowsing data requests.

chrome/browser/safe_browsing/safe_browsing_service.cc

Index: chrome/browser/safe_browsing/safe_browsing_service.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_service.cc b/chrome/browser/safe_browsing/safe_browsing_service.cc
index b957300e6a2278adcc248be6119ebcfb90716bcc..80dd087fe6e052eaa2a328064da2cc101ec983c7 100644
--- a/chrome/browser/safe_browsing/safe_browsing_service.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_service.cc
@@ -58,6 +58,21 @@ const FilePath::CharType kCookiesFile[] = FILE_PATH_LITERAL(" Cookies");
 const char* const kSbDefaultURLPrefix =
     "https://safebrowsing.google.com/safebrowsing";
 
+// The backup URL prefix where browser fetches chunk updates, hashes,
+// and reports safe browsing hits and malware details.

[mattm, 2013/01/12 02:24:49]

Instead of duplicating the same comment for each one, maybe just say that it's
the backup url prefix used when the default url fails with error type foo

[cbentzel, 2013/01/14 11:33:35]

Done.

+const char* const kSbBackupConnectErrorURLPrefix =
+    "https://alt1-safebrowsing.google.com/safebrowsing";
+
+// The backup URL prefix where browser fetches chunk updates, hashes,
+// and reports safe browsing hits and malware details.
+const char* const kSbBackupHttpErrorURLPrefix =
+    "https://alt2-safebrowsing.google.com/safebrowsing";
+
+// The backup URL prefix where browser fetches chunk updates, hashes,
+// and reports safe browsing hits and malware details.
+const char* const kSbBackupNetworkErrorURLPrefix =
+    "https://alt3-safebrowsing.google.com/safebrowsing";
+
 FilePath CookieFilePath() {
   return FilePath(
       SafeBrowsingService::GetBaseFilename().value() + kCookiesFile);
@@ -341,6 +356,9 @@ void SafeBrowsingService::StartOnIOThread() {
       cmdline->HasSwitch(switches::kSbURLPrefix) ?
       cmdline->GetSwitchValueASCII(switches::kSbURLPrefix) :
       kSbDefaultURLPrefix;
+  config.backup_connect_error_url_prefix = kSbBackupConnectErrorURLPrefix;
+  config.backup_http_error_url_prefix = kSbBackupHttpErrorURLPrefix;
+  config.backup_network_error_url_prefix = kSbBackupNetworkErrorURLPrefix;
 
 #if defined(FULL_SAFE_BROWSING)
   DCHECK(database_manager_);