Re-enable the messaging/connect extension API test.

chrome/browser/extensions/extension_messages_apitest.cc

Index: chrome/browser/extensions/extension_messages_apitest.cc
diff --git a/chrome/browser/extensions/extension_messages_apitest.cc b/chrome/browser/extensions/extension_messages_apitest.cc
index af750c22be311f87febf911659fda8af55580c1e..75833a342b46f09d5dd580172c1af5e6cca07f6a 100644
--- a/chrome/browser/extensions/extension_messages_apitest.cc
+++ b/chrome/browser/extensions/extension_messages_apitest.cc
@@ -77,8 +77,7 @@ class MessageSender : public content::NotificationObserver {
 }  // namespace
 
 // Tests that message passing between extensions and content scripts works.
-// Flaky on the trybots. See http://crbug.com/96725.
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_Messaging) {
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Messaging) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionTest("messaging/connect")) << message_;
 }