Attempt to fix flaky PlatformAppBrowserTest.Messaging.

chrome/browser/apps/app_browsertest.cc

Index: chrome/browser/apps/app_browsertest.cc
diff --git a/chrome/browser/apps/app_browsertest.cc b/chrome/browser/apps/app_browsertest.cc
index a5a75823538c2a0780df22b8cb7a5bebc28f9657..4dfedf004be80f0e24ca9dfc8e31bf03697b54b0 100644
--- a/chrome/browser/apps/app_browsertest.cc
+++ b/chrome/browser/apps/app_browsertest.cc
@@ -1041,16 +1041,9 @@ IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, ComponentAppBackgroundPage) {
   ASSERT_TRUE(launched_listener.WaitUntilSatisfied());
 }
 
-// Fails on Win7. http://crbug.com/171450
-#if defined(OS_WIN)
-#define MAYBE_Messaging DISABLED_Messaging
-#else
-#define MAYBE_Messaging Messaging
-#endif
-
-IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, MAYBE_Messaging) {
+IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, Messaging) {
   ExtensionApiTest::ResultCatcher result_catcher;
-  LoadAndLaunchPlatformApp("messaging/app2", "Launched");
+  LoadAndLaunchPlatformApp("messaging/app2", "Ready");
   LoadAndLaunchPlatformApp("messaging/app1", "Launched");
   EXPECT_TRUE(result_catcher.GetNextResult());
 }