Re-enable two flaky tests that were disabled due to timeouts.

content/browser/utility_process_mojo_client_browsertest.cc

Index: content/browser/utility_process_mojo_client_browsertest.cc
diff --git a/content/browser/utility_process_mojo_client_browsertest.cc b/content/browser/utility_process_mojo_client_browsertest.cc
index 7ffa80dfce79f848330ab0fa815e411fc70414dc..9c38951893c983a42790d2dabb3863e114dfb337 100644
--- a/content/browser/utility_process_mojo_client_browsertest.cc
+++ b/content/browser/utility_process_mojo_client_browsertest.cc
@@ -84,9 +84,7 @@ IN_PROC_BROWSER_TEST_F(UtilityProcessMojoClientBrowserTest, CallService) {
 
 // Call the Mojo service but the utility process terminates before getting
 // the result back.
-// TODO(pmonette): Re-enable when crbug.com/618206 is fixed.
-IN_PROC_BROWSER_TEST_F(UtilityProcessMojoClientBrowserTest,
-                       DISABLED_ConnectionError) {
+IN_PROC_BROWSER_TEST_F(UtilityProcessMojoClientBrowserTest, ConnectionError) {
   base::RunLoop run_loop;
   done_closure_ = run_loop.QuitClosure();