Move SecurityLevel into a class of its own

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
index ea1395aec319b248c69d6471e5f29f83656ba9b3..8df02eb3fce5a5ba386e8e41018baf6b68e83f49 100644
--- a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
+++ b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
@@ -26,6 +26,7 @@
 #include "chrome/browser/search/instant_service_factory.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
+#include "chrome/browser/ssl/security_level_policy.h"
 #include "chrome/browser/translate/chrome_translate_client.h"
 #include "chrome/browser/translate/translate_service.h"
 #include "chrome/browser/ui/browser_instant_controller.h"
@@ -435,7 +436,7 @@ void LocationBarViewMac::Layout() {
     selected_keyword_decoration_->SetKeyword(short_name, is_extension_keyword);
     selected_keyword_decoration_->SetImage(GetKeywordImage(keyword));
   } else if ((GetToolbarModel()->GetSecurityLevel(false) ==
-              ToolbarModel::EV_SECURE)) {
+              SecurityLevelPolicy::EV_SECURE)) {
     // Switch from location icon to show the EV bubble instead.
     location_icon_decoration_->SetVisible(false);
     ev_bubble_decoration_->SetVisible(true);