Reenable LocalNTPVoiceSearchSmokeTest.MicrophonePermission

This should have been fixed by https://crrev.com/c/1036230. The source
of the memory being leaked (creating the old IPC messages) was removed
by mojoification.

Bug: 838420
Change-Id: I115e390cbd458ee71c7eb679bc2f84fb2ee1d823
Reviewed-on: https://chromium-review.googlesource.com/1069120
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Adithya Srinivasan <adithyas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560656}

chrome/browser/ui/search/local_ntp_voice_search_browsertest.cc

@@ -75,15 +75,7 @@ IN_PROC_BROWSER_TEST_F(LocalNTPVoiceSearchSmokeTest,
   EXPECT_TRUE(console_observer.message().empty()) << console_observer.message();
 }
 
-// Flakily leaks (and fails) on LSAN. crbug.com/838420
-#if defined(LEAK_SANITIZER)
-#define MAYBE_MicrophonePermission DISABLED_MicrophonePermission
-#else
-#define MAYBE_MicrophonePermission MicrophonePermission
-#endif
-
-IN_PROC_BROWSER_TEST_F(LocalNTPVoiceSearchSmokeTest,
-                       MAYBE_MicrophonePermission) {
+IN_PROC_BROWSER_TEST_F(LocalNTPVoiceSearchSmokeTest, MicrophonePermission) {
   // Open a new NTP.
   content::WebContents* active_tab = local_ntp_test_utils::OpenNewTab(
       browser(), GURL(chrome::kChromeUINewTabURL));