Added "--login-user=" option for the Guest session.

chrome/browser/ui/views/bookmark_bar_view.cc

Index: chrome/browser/ui/views/bookmark_bar_view.cc
diff --git a/chrome/browser/ui/views/bookmark_bar_view.cc b/chrome/browser/ui/views/bookmark_bar_view.cc
index 1555584ad9f0dfdce6852418c1ca7b0e4c64ecd0..25fe870c48b72a7ed97c6b33ce3f966a75438d5b 100644
--- a/chrome/browser/ui/views/bookmark_bar_view.cc
+++ b/chrome/browser/ui/views/bookmark_bar_view.cc
@@ -232,10 +232,8 @@ class OverFlowButton : public views::MenuButton {
 };
 
 void RecordAppLaunch(Profile* profile, GURL url) {
-  // TODO: the ExtensionService should never be NULL, but in some cases it is,
-  // see bug 73768. After it is resolved, the explicit test can go away.
-  ExtensionService* service = profile->GetExtensionService();
-  if (!service || !service->IsInstalledApp(url))
+  DCHECK(profile->GetExtensionService());
+  if (!profile->GetExtensionService()->IsInstalledApp(url))
     return;
 
   UMA_HISTOGRAM_ENUMERATION(extension_misc::kAppLaunchHistogram,