Add enableReferrers and enableHyperlinkAuditing to contentSettings.misc API.

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index f5f68113407a3a4ab62054946b9f60ecea0831be..373abfe9a50666318cea207669463bcdfdbbc93f 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -307,11 +307,15 @@ IOThread::IOThread(
       prefs::kAuthNegotiateDelegateWhitelist);
   gssapi_library_name_ = local_state->GetString(prefs::kGSSAPILibraryName);
   pref_proxy_config_tracker_ = new PrefProxyConfigTracker(local_state);
+  enable_referrers_ = new BooleanPrefMember();
+  enable_referrers_->Init(prefs::kEnableReferrers, local_state, NULL);
+  enable_referrers_->MoveToThread(BrowserThread::IO);
 }
 
 IOThread::~IOThread() {
   if (pref_proxy_config_tracker_)
     pref_proxy_config_tracker_->DetachFromPrefService();
+  enable_referrers_->Destroy();
   // We cannot rely on our base class to stop the thread since we want our
   // CleanUp function to run.
   Stop();
@@ -424,7 +428,10 @@ void IOThread::Init() {
   globals_->extension_event_router_forwarder =
       extension_event_router_forwarder_;
   globals_->system_network_delegate.reset(new ChromeNetworkDelegate(
-      extension_event_router_forwarder_, Profile::kInvalidProfileId, NULL));
+      extension_event_router_forwarder_,
+      Profile::kInvalidProfileId,
+      enable_referrers_,
+      NULL));
   globals_->host_resolver.reset(
       CreateGlobalHostResolver(net_log_));
   globals_->cert_verifier.reset(new net::CertVerifier);
@@ -542,6 +549,7 @@ void IOThread::RegisterPrefs(PrefService* local_state) {
   local_state->RegisterStringPref(prefs::kAuthServerWhitelist, "");
   local_state->RegisterStringPref(prefs::kAuthNegotiateDelegateWhitelist, "");
   local_state->RegisterStringPref(prefs::kGSSAPILibraryName, "");
+  local_state->RegisterBooleanPref(prefs::kEnableReferrers, true);
 }
 
 net::HttpAuthHandlerFactory* IOThread::CreateDefaultAuthHandlerFactory(