Remove TrayIMETest valgrind suppression

The underlying crash bug was fixed long ago.

BUG=545533
TEST=memory bots

Review-Url: https://codereview.chromium.org/2545873002
Cr-Original-Commit-Position: refs/heads/master@{#435844}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: d3550666767344584b74439978e464c7cf6ae5c7
diff --git a/gtest_exclude/ash_unittests.gtest-memcheck.txt b/gtest_exclude/ash_unittests.gtest-memcheck.txt
index 524292a..581421a 100644
--- a/gtest_exclude/ash_unittests.gtest-memcheck.txt
+++ b/gtest_exclude/ash_unittests.gtest-memcheck.txt
@@ -8,7 +8,5 @@
 WebNotificationTrayTest.*TouchFeedback*
 # http://crbug.com/504071
 MagnificationControllerTest.CenterTextCaretNotInsideViewport
-# https://crbug.com/516898
-TrayIMETest.PerformActionOnDetailedView
 # https://crbug.com/598950
 ToastManagerTest.QueueMessage