Add enableReferrers and enableHyperlinkAuditing to contentSettings.misc API.

content/common/renderer_preferences.cc

Index: content/common/renderer_preferences.cc
diff --git a/content/common/renderer_preferences.cc b/content/common/renderer_preferences.cc
index 2ec7a223bf66970b9a0381ccd55ca84eb1a0af28..9a2060005428f8477905481b7a0a45a7ffb7780f 100644
--- a/content/common/renderer_preferences.cc
+++ b/content/common/renderer_preferences.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -19,5 +19,6 @@ RendererPreferences::RendererPreferences()
       inactive_selection_bg_color(0),
       inactive_selection_fg_color(0),
       browser_handles_top_level_requests(false),
-      caret_blink_interval(0) {
+      caret_blink_interval(0),
+      enable_referrers(true) {
 }