Fix unitialized pointer in RulesRegistryService.

TBR=thestig@chromium.org
BUG=none
TEST=less memcheck issues

Review URL: https://chromiumcodereview.appspot.com/16094012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202994 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/extensions/api/declarative/rules_registry_service.cc

@@ -32,7 +32,8 @@ void RegisterToExtensionWebRequestEventRouterOnIO(
 }  // namespace
 
 RulesRegistryService::RulesRegistryService(Profile* profile)
-    : profile_(profile) {
+    : content_rules_registry_(NULL),
+      profile_(profile) {
   if (profile) {
     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
                    content::Source<Profile>(profile->GetOriginalProfile()));