Don't kill key events even when it's VKEY_UNKNOWN.

ui/aura/window_event_dispatcher_unittest.cc

Index: ui/aura/window_event_dispatcher_unittest.cc
diff --git a/ui/aura/window_event_dispatcher_unittest.cc b/ui/aura/window_event_dispatcher_unittest.cc
index 5f677b90d538a81ff9422e4088be637d281b0d27..9c3a77ec15ac8d33d605fc36c8a93d740c2faa69 100644
--- a/ui/aura/window_event_dispatcher_unittest.cc
+++ b/ui/aura/window_event_dispatcher_unittest.cc
@@ -350,10 +350,26 @@ TEST_F(WindowEventDispatcherTest, IgnoreUnknownKeys) {
   EXPECT_FALSE(unknown_event.handled());
   EXPECT_EQ(0, handler.num_key_events());
 
+  handler.Reset();
   ui::KeyEvent known_event(ui::ET_KEY_PRESSED, ui::VKEY_A, 0, false);
   DispatchEventUsingWindowDispatcher(&known_event);
   EXPECT_TRUE(known_event.handled());
   EXPECT_EQ(1, handler.num_key_events());
+
+  handler.Reset();
+  ui::KeyEvent ime_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN,
+                         ui::EF_IME_FABRICATED_KEY, false);
+  DispatchEventUsingWindowDispatcher(&ime_event);
+  EXPECT_TRUE(ime_event.handled());
+  EXPECT_EQ(1, handler.num_key_events());
+
+  handler.Reset();
+  ui::KeyEvent unknown_key_with_char_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN,
+                                           0, false);
+  unknown_key_with_char_event.set_character(0x00e4 /* "ä" */);
+  DispatchEventUsingWindowDispatcher(&unknown_key_with_char_event);
+  EXPECT_TRUE(unknown_key_with_char_event.handled());
+  EXPECT_EQ(1, handler.num_key_events());
 }
 
 TEST_F(WindowEventDispatcherTest, NoDelegateWindowReceivesKeyEvents) {