Fix flaky SW registration in PushMessaging/BudgetManager browser tests

chrome/browser/budget_service/budget_manager_browsertest.cc

Index: chrome/browser/budget_service/budget_manager_browsertest.cc
diff --git a/chrome/browser/budget_service/budget_manager_browsertest.cc b/chrome/browser/budget_service/budget_manager_browsertest.cc
index e5ed5b8b6ad01b7addce93586c6bd54b01e71485..aef3cd4c4fd680ee19be200cca65ab3b373c4f34 100644
--- a/chrome/browser/budget_service/budget_manager_browsertest.cc
+++ b/chrome/browser/budget_service/budget_manager_browsertest.cc
@@ -118,13 +118,7 @@ IN_PROC_BROWSER_TEST_F(BudgetManagerBrowserTest, BudgetInDocument) {
   ASSERT_FALSE(success());
 }
 
-// Flaky on ChromeOS and Linux. See http://crbug.com/657202.
-#if defined(OS_CHROMEOS) || defined(OS_LINUX)
-#define MAYBE_BudgetInWorker DISABLED_BudgetInWorker
-#else
-#define MAYBE_BudgetInWorker BudgetInWorker
-#endif
-IN_PROC_BROWSER_TEST_F(BudgetManagerBrowserTest, MAYBE_BudgetInWorker) {
+IN_PROC_BROWSER_TEST_F(BudgetManagerBrowserTest, BudgetInWorker) {
   std::string script_result;
 
   ASSERT_TRUE(RunScript("registerServiceWorker()", &script_result));