Add an extension override bubble and warning box for proxy extensions.

extensions/browser/extension_prefs.cc

Index: extensions/browser/extension_prefs.cc
diff --git a/extensions/browser/extension_prefs.cc b/extensions/browser/extension_prefs.cc
index a3604e9109019283a31b5c8985d40a00d0c0094e..23d1d150f2316dd0477e5dc9ecb7573d28379335 100644
--- a/extensions/browser/extension_prefs.cc
+++ b/extensions/browser/extension_prefs.cc
@@ -78,6 +78,7 @@ const char kPrefBlacklistAcknowledged[] = "ack_blacklist";
 const char kPrefWipeoutAcknowledged[] = "ack_wiped";
 const char kPrefSettingsBubbleAcknowledged[] = "ack_settings_bubble";
 const char kPrefNtpBubbleAcknowledged[] = "ack_ntp_bubble";
+const char kPrefProxyBubbleAcknowledged[] = "ack_proxy_bubble";
 
 // Indicates whether the external extension was installed during the first
 // run of this profile.
@@ -761,6 +762,19 @@ void ExtensionPrefs::SetNtpOverriddenBubbleBeenAcknowledged(
                       value ? base::Value::CreateBooleanValue(value) : NULL);
 }
 
+bool ExtensionPrefs::HasProxyOverriddenBubbleBeenAcknowledged(
+    const std::string& extension_id) {
+  return ReadPrefAsBooleanAndReturn(extension_id, kPrefProxyBubbleAcknowledged);
+}
+
+void ExtensionPrefs::SetProxyOverriddenBubbleBeenAcknowledged(
+    const std::string& extension_id,
+    bool value) {
+  UpdateExtensionPref(extension_id,
+                      kPrefProxyBubbleAcknowledged,
+                      value ? base::Value::CreateBooleanValue(value) : NULL);
+}
+
 bool ExtensionPrefs::SetAlertSystemFirstRun() {
   if (prefs_->GetBoolean(pref_names::kAlertsInitialized)) {
     return true;