Revise ui::DomKey to unify character and non-character codes.

ui/base/ime/chromeos/character_composer_unittest.cc

Index: ui/base/ime/chromeos/character_composer_unittest.cc
diff --git a/ui/base/ime/chromeos/character_composer_unittest.cc b/ui/base/ime/chromeos/character_composer_unittest.cc
index 1e305c71f03b89bb15199afba6b72b33c8cf8fb1..51b585f0eccf7cf233294b0afe680779f568ab03 100644
--- a/ui/base/ime/chromeos/character_composer_unittest.cc
+++ b/ui/base/ime/chromeos/character_composer_unittest.cc
@@ -34,7 +34,8 @@ class CharacterComposerTest : public testing::Test {
   KeyEvent* DeadKeyPress(base::char16 combining_character) const {
     KeyEvent* event =
         new KeyEvent(ET_KEY_PRESSED, VKEY_UNKNOWN, DomCode::NONE, EF_NONE,
-                     DomKey::DEAD, combining_character, EventTimeForNow());
+                     DomKey::DeadKeyFromCombiningCharacter(combining_character),
+                     EventTimeForNow());
     return event;
   }
 
@@ -59,7 +60,7 @@ class CharacterComposerTest : public testing::Test {
                             int flags,
                             base::char16 character) const {
     KeyEvent* event = new KeyEvent(ET_KEY_PRESSED, vkey, code, flags,
-                                   CharacterToDomKey(character), character,
+                                   DomKey::FromCharacter(character),
                                    EventTimeForNow());
     return event;
   }