Implement safebrowsing download feedback service, enabled for dev & canary only.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index e757578454bad4cd015d12781080d826b24e1626..288e61eee09c707afd9d284f1b6f65529f8ffbf8 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1248,6 +1248,13 @@ const char kSbDisableExtensionBlacklist[] =
 const char kSbDisableSideEffectFreeWhitelist[] =
     "safebrowsing-disable-side-effect-free-whitelist";
 
+// URL to send safebrowsing download feedback reports to.
+const char kSbDownloadFeedbackURL[] = "safebrowsing-download-feedback-url";
+
+// Enable safebrowsing download feedback.
+const char kSbEnableDownloadFeedback[] =
+    "safebrowsing-enable-download-feedback";
+
 // Enables or disables extension scripts badges in the location bar.
 const char kScriptBadges[]                  = "script-badges";