IME for Mus: Fix InputMethodMusTest.DispatchKeyEvent's deadlock.

ui/views/mus/input_method_mus_unittest.cc

Index: ui/views/mus/input_method_mus_unittest.cc
diff --git a/ui/views/mus/input_method_mus_unittest.cc b/ui/views/mus/input_method_mus_unittest.cc
index 1d010315fc5ecc7086743ca74aaaf12f15356716..047463791808817d9bfbb432f259047a0242c2ff 100644
--- a/ui/views/mus/input_method_mus_unittest.cc
+++ b/ui/views/mus/input_method_mus_unittest.cc
@@ -77,12 +77,7 @@ class InputMethodMusTest : public testing::Test {
   DISALLOW_COPY_AND_ASSIGN(InputMethodMusTest);
 };
 
-// Disabled as deadlocks. See http://crbug.com/668181.
-TEST_F(InputMethodMusTest, DISABLED_DispatchKeyEvent) {
-  // test_ime_driver will register itself as the current IMEDriver. It echoes
-  // back the character key events it receives.
-  EXPECT_TRUE(connector()->Connect("test_ime_driver"));
-
+TEST_F(InputMethodMusTest, DispatchKeyEvent) {
   TestInputMethodDelegate input_method_delegate;
   InputMethodMus input_method(&input_method_delegate, nullptr);
   input_method.Init(connector());