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

ui/events/keycodes/keyboard_code_conversion_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/keycodes/keyboard_code_conversion.h"
 
 #include "base/basictypes.h"
 #include "base/strings/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/dom/dom_code.h"
 #include "ui/events/keycodes/dom/dom_key.h"
 #include "ui/events/keycodes/dom/keycode_converter.h"
 #include "ui/events/keycodes/dom_us_layout_data.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
 namespace {
 
 struct Meaning {
   bool defined;
-  ui::DomKey dom_key;
-  base::char16 character;
-  ui::KeyboardCode legacy_key_code;
+  ui::DomKey::Base dom_key;
+  ui::KeyboardCode key_code;
 };
 
-const Meaning kUndefined = {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN};
+const Meaning kUndefined = {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN};
 
 void CheckDomCodeToMeaning(const char* label,
                            bool f(ui::DomCode dom_code,
                                   int flags,
                                   ui::DomKey* out_dom_key,
-                                  base::char16* out_character,
                                   ui::KeyboardCode* out_key_code),
                            ui::DomCode dom_code,
                            int event_flags,
                            const Meaning& result) {
   ui::DomKey result_dom_key = ui::DomKey::NONE;
-  base::char16 result_character = 0;
-  ui::KeyboardCode result_legacy_key_code = ui::VKEY_UNKNOWN;
-  bool success = f(dom_code, event_flags, &result_dom_key, &result_character,
-                   &result_legacy_key_code);
+  ui::KeyboardCode result_key_code = ui::VKEY_UNKNOWN;
+  bool success = f(dom_code, event_flags, &result_dom_key, &result_key_code);
   SCOPED_TRACE(
       base::StringPrintf("%s %s %06X:%04X", label,
                          ui::KeycodeConverter::DomCodeToCodeString(dom_code),
                          static_cast<int>(dom_code), event_flags));
   EXPECT_EQ(result.defined, success);
   if (success) {
     EXPECT_EQ(result.dom_key, result_dom_key)
         << "Expected '"
         << ui::KeycodeConverter::DomKeyToKeyString(result.dom_key)
         << "' Actual '"
         << ui::KeycodeConverter::DomKeyToKeyString(result_dom_key) << "'";
-    EXPECT_EQ(result.character, result_character);
-    EXPECT_EQ(result.legacy_key_code, result_legacy_key_code);
+    EXPECT_EQ(result.key_code, result_key_code);
   } else {
     // Should not have touched output parameters.
     EXPECT_EQ(ui::DomKey::NONE, result_dom_key);
-    EXPECT_EQ(0, result_character);
-    EXPECT_EQ(ui::VKEY_UNKNOWN, result_legacy_key_code);
+    EXPECT_EQ(ui::VKEY_UNKNOWN, result_key_code);
   }
 }
 
 TEST(KeyboardCodeConversion, ControlCharacters) {
   // The codes in this table are handled by |DomCodeToControlCharacter()|.
   static const struct {
     ui::DomCode dom_code;
     Meaning control;
     Meaning control_shift;
   } kControlCharacters[] = {
       {ui::DomCode::KEY_A,
-       {true, ui::DomKey::CHARACTER, 0x01, ui::VKEY_A},
-       {true, ui::DomKey::CHARACTER, 0x01, ui::VKEY_A}},
+       {true, ui::DomKey::Constant<0x01>::Character, ui::VKEY_A},
+       {true, ui::DomKey::Constant<0x01>::Character, ui::VKEY_A}},
       {ui::DomCode::KEY_B,
-       {true, ui::DomKey::CHARACTER, 0x02, ui::VKEY_B},
-       {true, ui::DomKey::CHARACTER, 0x02, ui::VKEY_B}},
+       {true, ui::DomKey::Constant<0x02>::Character, ui::VKEY_B},
+       {true, ui::DomKey::Constant<0x02>::Character, ui::VKEY_B}},
       {ui::DomCode::KEY_C,
-       {true, ui::DomKey::CHARACTER, 0x03, ui::VKEY_C},
-       {true, ui::DomKey::CHARACTER, 0x03, ui::VKEY_C}},
+       {true, ui::DomKey::Constant<0x03>::Character, ui::VKEY_C},
+       {true, ui::DomKey::Constant<0x03>::Character, ui::VKEY_C}},
       {ui::DomCode::KEY_D,
-       {true, ui::DomKey::CHARACTER, 0x04, ui::VKEY_D},
-       {true, ui::DomKey::CHARACTER, 0x04, ui::VKEY_D}},
+       {true, ui::DomKey::Constant<0x04>::Character, ui::VKEY_D},
+       {true, ui::DomKey::Constant<0x04>::Character, ui::VKEY_D}},
       {ui::DomCode::KEY_E,
-       {true, ui::DomKey::CHARACTER, 0x05, ui::VKEY_E},
-       {true, ui::DomKey::CHARACTER, 0x05, ui::VKEY_E}},
+       {true, ui::DomKey::Constant<0x05>::Character, ui::VKEY_E},
+       {true, ui::DomKey::Constant<0x05>::Character, ui::VKEY_E}},
       {ui::DomCode::KEY_F,
-       {true, ui::DomKey::CHARACTER, 0x06, ui::VKEY_F},
-       {true, ui::DomKey::CHARACTER, 0x06, ui::VKEY_F}},
+       {true, ui::DomKey::Constant<0x06>::Character, ui::VKEY_F},
+       {true, ui::DomKey::Constant<0x06>::Character, ui::VKEY_F}},
       {ui::DomCode::KEY_G,
-       {true, ui::DomKey::CHARACTER, 0x07, ui::VKEY_G},
-       {true, ui::DomKey::CHARACTER, 0x07, ui::VKEY_G}},
+       {true, ui::DomKey::Constant<0x07>::Character, ui::VKEY_G},
+       {true, ui::DomKey::Constant<0x07>::Character, ui::VKEY_G}},
       {ui::DomCode::KEY_H,
-       {true, ui::DomKey::BACKSPACE, 0x08, ui::VKEY_BACK},
-       {true, ui::DomKey::BACKSPACE, 0x08, ui::VKEY_BACK}},
+       {true, ui::DomKey::BACKSPACE, ui::VKEY_BACK},
+       {true, ui::DomKey::BACKSPACE, ui::VKEY_BACK}},
       {ui::DomCode::KEY_I,
-       {true, ui::DomKey::TAB, 0x09, ui::VKEY_TAB},
-       {true, ui::DomKey::TAB, 0x09, ui::VKEY_TAB}},
+       {true, ui::DomKey::TAB, ui::VKEY_TAB},
+       {true, ui::DomKey::TAB, ui::VKEY_TAB}},
       {ui::DomCode::KEY_J,
-       {true, ui::DomKey::CHARACTER, 0x0A, ui::VKEY_J},
-       {true, ui::DomKey::CHARACTER, 0x0A, ui::VKEY_J}},
+       {true, ui::DomKey::Constant<0x0A>::Character, ui::VKEY_J},
+       {true, ui::DomKey::Constant<0x0A>::Character, ui::VKEY_J}},
       {ui::DomCode::KEY_K,
-       {true, ui::DomKey::CHARACTER, 0x0B, ui::VKEY_K},
-       {true, ui::DomKey::CHARACTER, 0x0B, ui::VKEY_K}},
+       {true, ui::DomKey::Constant<0x0B>::Character, ui::VKEY_K},
+       {true, ui::DomKey::Constant<0x0B>::Character, ui::VKEY_K}},
       {ui::DomCode::KEY_L,
-       {true, ui::DomKey::CHARACTER, 0x0C, ui::VKEY_L},
-       {true, ui::DomKey::CHARACTER, 0x0C, ui::VKEY_L}},
+       {true, ui::DomKey::Constant<0x0C>::Character, ui::VKEY_L},
+       {true, ui::DomKey::Constant<0x0C>::Character, ui::VKEY_L}},
       {ui::DomCode::KEY_M,
-       {true, ui::DomKey::ENTER, 0x0D, ui::VKEY_RETURN},
-       {true, ui::DomKey::ENTER, 0x0D, ui::VKEY_RETURN}},
+       {true, ui::DomKey::ENTER, ui::VKEY_RETURN},
+       {true, ui::DomKey::ENTER, ui::VKEY_RETURN}},
       {ui::DomCode::KEY_N,
-       {true, ui::DomKey::CHARACTER, 0x0E, ui::VKEY_N},
-       {true, ui::DomKey::CHARACTER, 0x0E, ui::VKEY_N}},
+       {true, ui::DomKey::Constant<0x0E>::Character, ui::VKEY_N},
+       {true, ui::DomKey::Constant<0x0E>::Character, ui::VKEY_N}},
       {ui::DomCode::KEY_O,
-       {true, ui::DomKey::CHARACTER, 0x0F, ui::VKEY_O},
-       {true, ui::DomKey::CHARACTER, 0x0F, ui::VKEY_O}},
+       {true, ui::DomKey::Constant<0x0F>::Character, ui::VKEY_O},
+       {true, ui::DomKey::Constant<0x0F>::Character, ui::VKEY_O}},
       {ui::DomCode::KEY_P,
-       {true, ui::DomKey::CHARACTER, 0x10, ui::VKEY_P},
-       {true, ui::DomKey::CHARACTER, 0x10, ui::VKEY_P}},
+       {true, ui::DomKey::Constant<0x10>::Character, ui::VKEY_P},
+       {true, ui::DomKey::Constant<0x10>::Character, ui::VKEY_P}},
       {ui::DomCode::KEY_Q,
-       {true, ui::DomKey::CHARACTER, 0x11, ui::VKEY_Q},
-       {true, ui::DomKey::CHARACTER, 0x11, ui::VKEY_Q}},
+       {true, ui::DomKey::Constant<0x11>::Character, ui::VKEY_Q},
+       {true, ui::DomKey::Constant<0x11>::Character, ui::VKEY_Q}},
       {ui::DomCode::KEY_R,
-       {true, ui::DomKey::CHARACTER, 0x12, ui::VKEY_R},
-       {true, ui::DomKey::CHARACTER, 0x12, ui::VKEY_R}},
+       {true, ui::DomKey::Constant<0x12>::Character, ui::VKEY_R},
+       {true, ui::DomKey::Constant<0x12>::Character, ui::VKEY_R}},
       {ui::DomCode::KEY_S,
-       {true, ui::DomKey::CHARACTER, 0x13, ui::VKEY_S},
-       {true, ui::DomKey::CHARACTER, 0x13, ui::VKEY_S}},
+       {true, ui::DomKey::Constant<0x13>::Character, ui::VKEY_S},
+       {true, ui::DomKey::Constant<0x13>::Character, ui::VKEY_S}},
       {ui::DomCode::KEY_T,
-       {true, ui::DomKey::CHARACTER, 0x14, ui::VKEY_T},
-       {true, ui::DomKey::CHARACTER, 0x14, ui::VKEY_T}},
+       {true, ui::DomKey::Constant<0x14>::Character, ui::VKEY_T},
+       {true, ui::DomKey::Constant<0x14>::Character, ui::VKEY_T}},
       {ui::DomCode::KEY_U,
-       {true, ui::DomKey::CHARACTER, 0x15, ui::VKEY_U},
-       {true, ui::DomKey::CHARACTER, 0x15, ui::VKEY_U}},
+       {true, ui::DomKey::Constant<0x15>::Character, ui::VKEY_U},
+       {true, ui::DomKey::Constant<0x15>::Character, ui::VKEY_U}},
       {ui::DomCode::KEY_V,
-       {true, ui::DomKey::CHARACTER, 0x16, ui::VKEY_V},
-       {true, ui::DomKey::CHARACTER, 0x16, ui::VKEY_V}},
+       {true, ui::DomKey::Constant<0x16>::Character, ui::VKEY_V},
+       {true, ui::DomKey::Constant<0x16>::Character, ui::VKEY_V}},
       {ui::DomCode::KEY_W,
-       {true, ui::DomKey::CHARACTER, 0x17, ui::VKEY_W},
-       {true, ui::DomKey::CHARACTER, 0x17, ui::VKEY_W}},
+       {true, ui::DomKey::Constant<0x17>::Character, ui::VKEY_W},
+       {true, ui::DomKey::Constant<0x17>::Character, ui::VKEY_W}},
       {ui::DomCode::KEY_X,
-       {true, ui::DomKey::CHARACTER, 0x18, ui::VKEY_X},
-       {true, ui::DomKey::CHARACTER, 0x18, ui::VKEY_X}},
+       {true, ui::DomKey::Constant<0x18>::Character, ui::VKEY_X},
+       {true, ui::DomKey::Constant<0x18>::Character, ui::VKEY_X}},
       {ui::DomCode::KEY_Y,
-       {true, ui::DomKey::CHARACTER, 0x19, ui::VKEY_Y},
-       {true, ui::DomKey::CHARACTER, 0x19, ui::VKEY_Y}},
+       {true, ui::DomKey::Constant<0x19>::Character, ui::VKEY_Y},
+       {true, ui::DomKey::Constant<0x19>::Character, ui::VKEY_Y}},
       {ui::DomCode::KEY_Z,
-       {true, ui::DomKey::CHARACTER, 0x1A, ui::VKEY_Z},
-       {true, ui::DomKey::CHARACTER, 0x1A, ui::VKEY_Z}},
+       {true, ui::DomKey::Constant<0x1A>::Character, ui::VKEY_Z},
+       {true, ui::DomKey::Constant<0x1A>::Character, ui::VKEY_Z}},
   };
   for (const auto& it : kControlCharacters) {
     // Verify |DomCodeToControlCharacter()|.
     CheckDomCodeToMeaning("c_cc_n", ui::DomCodeToControlCharacter, it.dom_code,
                           ui::EF_NONE, kUndefined);
     CheckDomCodeToMeaning("c_cc_c", ui::DomCodeToControlCharacter, it.dom_code,
                            ui::EF_CONTROL_DOWN, it.control);
     CheckDomCodeToMeaning("c_cc_cs", ui::DomCodeToControlCharacter, it.dom_code,
                           ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN,
                           it.control_shift);
-    // Verify |DomCodeToUsLayoutMeaning()|.
-    CheckDomCodeToMeaning("c_us_c", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    // Verify |DomCodeToUsLayoutDomKey()|.
+    CheckDomCodeToMeaning("c_us_c", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_CONTROL_DOWN, it.control);
-    CheckDomCodeToMeaning("c_us_cs", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("c_us_cs", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN,
                           it.control_shift);
   }
 
   // The codes in this table are sensitive to the Shift state, so they are
   // handled differently by |DomCodeToControlCharacter()|, which returns false
-  // for unknown combinations, vs |DomCodeToUsLayoutMeaning()|, which returns
+  // for unknown combinations, vs |DomCodeToUsLayoutDomKey()|, which returns
   // true with DomKey::UNIDENTIFIED.
   static const struct {
     ui::DomCode dom_code;
     Meaning cc_control;
     Meaning cc_control_shift;
     Meaning us_control;
     Meaning us_control_shift;
   } kShiftControlCharacters[] = {
       {ui::DomCode::DIGIT2,
-       {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, 0, ui::VKEY_2},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_2},
-       {true, ui::DomKey::CHARACTER, 0, ui::VKEY_2}},
+       {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<0>::Character, ui::VKEY_2},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_2},
+       {true, ui::DomKey::Constant<0>::Character, ui::VKEY_2}},
       {ui::DomCode::DIGIT6,
-       {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, 0x1E, ui::VKEY_6},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_6},
-       {true, ui::DomKey::CHARACTER, 0x1E, ui::VKEY_6}},
+       {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<0x1E>::Character, ui::VKEY_6},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_6},
+       {true, ui::DomKey::Constant<0x1E>::Character, ui::VKEY_6}},
       {ui::DomCode::MINUS,
-       {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, 0x1F, ui::VKEY_OEM_MINUS},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_OEM_MINUS},
-       {true, ui::DomKey::CHARACTER, 0x1F, ui::VKEY_OEM_MINUS}},
+       {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<0x1F>::Character, ui::VKEY_OEM_MINUS},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_OEM_MINUS},
+       {true, ui::DomKey::Constant<0x1F>::Character, ui::VKEY_OEM_MINUS}},
       {ui::DomCode::ENTER,
-       {true, ui::DomKey::CHARACTER, 0x0A, ui::VKEY_RETURN},
-       {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, 0x0A, ui::VKEY_RETURN},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_RETURN}},
+       {true, ui::DomKey::Constant<0x0A>::Character, ui::VKEY_RETURN},
+       {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<0x0A>::Character, ui::VKEY_RETURN},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_RETURN}},
       {ui::DomCode::BRACKET_LEFT,
-       {true, ui::DomKey::ESCAPE, 0x1B, ui::VKEY_OEM_4},
-       {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::ESCAPE, 0x1B, ui::VKEY_OEM_4},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_OEM_4}},
+       {true, ui::DomKey::ESCAPE, ui::VKEY_OEM_4},
+       {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::ESCAPE, ui::VKEY_OEM_4},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_OEM_4}},
       {ui::DomCode::BACKSLASH,
-       {true, ui::DomKey::CHARACTER, 0x1C, ui::VKEY_OEM_5},
-       {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, 0x1C, ui::VKEY_OEM_5},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_OEM_5}},
+       {true, ui::DomKey::Constant<0x1C>::Character, ui::VKEY_OEM_5},
+       {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<0x1C>::Character, ui::VKEY_OEM_5},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_OEM_5}},
       {ui::DomCode::BRACKET_RIGHT,
-       {true, ui::DomKey::CHARACTER, 0x1D, ui::VKEY_OEM_6},
-       {false, ui::DomKey::NONE, 0, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, 0x1D, ui::VKEY_OEM_6},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_OEM_6}},
+       {true, ui::DomKey::Constant<0x1D>::Character, ui::VKEY_OEM_6},
+       {false, ui::DomKey::NONE, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<0x1D>::Character, ui::VKEY_OEM_6},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_OEM_6}},
   };
   for (const auto& it : kShiftControlCharacters) {
     // Verify |DomCodeToControlCharacter()|.
     CheckDomCodeToMeaning("s_cc_n", ui::DomCodeToControlCharacter, it.dom_code,
                           ui::EF_NONE, kUndefined);
     CheckDomCodeToMeaning("s_cc_c", ui::DomCodeToControlCharacter, it.dom_code,
                            ui::EF_CONTROL_DOWN, it.cc_control);
     CheckDomCodeToMeaning("s_cc_cs", ui::DomCodeToControlCharacter, it.dom_code,
                           ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN,
                           it.cc_control_shift);
-    // Verify |DomCodeToUsLayoutMeaning()|.
-    CheckDomCodeToMeaning("s_us_c", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    // Verify |DomCodeToUsLayoutDomKey()|.
+    CheckDomCodeToMeaning("s_us_c", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_CONTROL_DOWN, it.us_control);
-    CheckDomCodeToMeaning("s_us_cs", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("s_us_cs", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN,
                           it.us_control_shift);
   }
 
   // These codes are not handled by |DomCodeToControlCharacter()| directly.
   static const struct {
     ui::DomCode dom_code;
     Meaning normal;
     Meaning control;
   } kNonControlCharacters[] = {
-      // Modifiers are handled by |DomCodeToUsLayoutMeaning()| without regard
+      // Modifiers are handled by |DomCodeToUsLayoutDomKey()| without regard
       // to whether Control is down.
       {ui::DomCode::CONTROL_LEFT,
-       {true, ui::DomKey::CONTROL, 0, ui::VKEY_CONTROL},
-       {true, ui::DomKey::CONTROL, 0, ui::VKEY_CONTROL}},
+       {true, ui::DomKey::CONTROL, ui::VKEY_CONTROL},
+       {true, ui::DomKey::CONTROL, ui::VKEY_CONTROL}},
       {ui::DomCode::CONTROL_RIGHT,
-       {true, ui::DomKey::CONTROL, 0, ui::VKEY_CONTROL},
-       {true, ui::DomKey::CONTROL, 0, ui::VKEY_CONTROL}},
+       {true, ui::DomKey::CONTROL, ui::VKEY_CONTROL},
+       {true, ui::DomKey::CONTROL, ui::VKEY_CONTROL}},
       {ui::DomCode::SHIFT_LEFT,
-       {true, ui::DomKey::SHIFT, 0, ui::VKEY_SHIFT},
-       {true, ui::DomKey::SHIFT, 0, ui::VKEY_SHIFT}},
+       {true, ui::DomKey::SHIFT, ui::VKEY_SHIFT},
+       {true, ui::DomKey::SHIFT, ui::VKEY_SHIFT}},
       {ui::DomCode::SHIFT_RIGHT,
-       {true, ui::DomKey::SHIFT, 0, ui::VKEY_SHIFT},
-       {true, ui::DomKey::SHIFT, 0, ui::VKEY_SHIFT}},
+       {true, ui::DomKey::SHIFT, ui::VKEY_SHIFT},
+       {true, ui::DomKey::SHIFT, ui::VKEY_SHIFT}},
       {ui::DomCode::ALT_LEFT,
-       {true, ui::DomKey::ALT, 0, ui::VKEY_MENU},
-       {true, ui::DomKey::ALT, 0, ui::VKEY_MENU}},
+       {true, ui::DomKey::ALT, ui::VKEY_MENU},
+       {true, ui::DomKey::ALT, ui::VKEY_MENU}},
       {ui::DomCode::ALT_RIGHT,
-       {true, ui::DomKey::ALT, 0, ui::VKEY_MENU},
-       {true, ui::DomKey::ALT, 0, ui::VKEY_MENU}},
+       {true, ui::DomKey::ALT, ui::VKEY_MENU},
+       {true, ui::DomKey::ALT, ui::VKEY_MENU}},
       {ui::DomCode::OS_LEFT,
-       {true, ui::DomKey::OS, 0, ui::VKEY_LWIN},
-       {true, ui::DomKey::OS, 0, ui::VKEY_LWIN}},
+       {true, ui::DomKey::OS, ui::VKEY_LWIN},
+       {true, ui::DomKey::OS, ui::VKEY_LWIN}},
       {ui::DomCode::OS_RIGHT,
-       {true, ui::DomKey::OS, 0, ui::VKEY_LWIN},
-       {true, ui::DomKey::OS, 0, ui::VKEY_LWIN}},
+       {true, ui::DomKey::OS, ui::VKEY_LWIN},
+       {true, ui::DomKey::OS, ui::VKEY_LWIN}},
       // Non-modifiers (a representative sample here) succeed with
       // DomKey::UNIDENTIFIED when Control is down.
       {ui::DomCode::DIGIT1,
-       {true, ui::DomKey::CHARACTER, '1', ui::VKEY_1},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_1}},
+       {true, ui::DomKey::Constant<'1'>::Character, ui::VKEY_1},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_1}},
       {ui::DomCode::EQUAL,
-       {true, ui::DomKey::CHARACTER, '=', ui::VKEY_OEM_PLUS},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_OEM_PLUS}},
+       {true, ui::DomKey::Constant<'='>::Character, ui::VKEY_OEM_PLUS},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_OEM_PLUS}},
       {ui::DomCode::TAB,
-       {true, ui::DomKey::TAB, 9, ui::VKEY_TAB},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_TAB}},
+       {true, ui::DomKey::TAB, ui::VKEY_TAB},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_TAB}},
       {ui::DomCode::F1,
-       {true, ui::DomKey::F1, 0, ui::VKEY_F1},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_F1}},
+       {true, ui::DomKey::F1, ui::VKEY_F1},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_F1}},
       {ui::DomCode::VOLUME_UP,
-       {true, ui::DomKey::VOLUME_UP, 0, ui::VKEY_VOLUME_UP},
-       {true, ui::DomKey::UNIDENTIFIED, 0, ui::VKEY_VOLUME_UP}},
+       {true, ui::DomKey::VOLUME_UP, ui::VKEY_VOLUME_UP},
+       {true, ui::DomKey::UNIDENTIFIED, ui::VKEY_VOLUME_UP}},
   };
   for (const auto& it : kNonControlCharacters) {
     // Verify |DomCodeToControlCharacter()|.
     CheckDomCodeToMeaning("n_cc_n", ui::DomCodeToControlCharacter, it.dom_code,
                           ui::EF_NONE, kUndefined);
     CheckDomCodeToMeaning("n_cc_c", ui::DomCodeToControlCharacter, it.dom_code,
                           ui::EF_CONTROL_DOWN, kUndefined);
     CheckDomCodeToMeaning("n_cc_cs", ui::DomCodeToControlCharacter, it.dom_code,
                           ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN, kUndefined);
-    // Verify |DomCodeToUsLayoutMeaning()|.
-    CheckDomCodeToMeaning("n_us_n", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    // Verify |DomCodeToUsLayoutDomKey()|.
+    CheckDomCodeToMeaning("n_us_n", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_NONE, it.normal);
-    CheckDomCodeToMeaning("n_us_c", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("n_us_c", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_CONTROL_DOWN, it.control);
-    CheckDomCodeToMeaning("n_us_cs", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("n_us_cs", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN, it.control);
   }
 }
 
 TEST(KeyboardCodeConversion, UsLayout) {
   static const struct {
     ui::DomCode dom_code;
     Meaning normal;
     Meaning shift;
   } kPrintableUsLayout[] = {
       {ui::DomCode::KEY_A,
-       {true, ui::DomKey::CHARACTER, 'a', ui::VKEY_A},
-       {true, ui::DomKey::CHARACTER, 'A', ui::VKEY_A}},
+       {true, ui::DomKey::Constant<'a'>::Character, ui::VKEY_A},
+       {true, ui::DomKey::Constant<'A'>::Character, ui::VKEY_A}},
       {ui::DomCode::KEY_B,
-       {true, ui::DomKey::CHARACTER, 'b', ui::VKEY_B},
-       {true, ui::DomKey::CHARACTER, 'B', ui::VKEY_B}},
+       {true, ui::DomKey::Constant<'b'>::Character, ui::VKEY_B},
+       {true, ui::DomKey::Constant<'B'>::Character, ui::VKEY_B}},
       {ui::DomCode::KEY_C,
-       {true, ui::DomKey::CHARACTER, 'c', ui::VKEY_C},
-       {true, ui::DomKey::CHARACTER, 'C', ui::VKEY_C}},
+       {true, ui::DomKey::Constant<'c'>::Character, ui::VKEY_C},
+       {true, ui::DomKey::Constant<'C'>::Character, ui::VKEY_C}},
       {ui::DomCode::KEY_D,
-       {true, ui::DomKey::CHARACTER, 'd', ui::VKEY_D},
-       {true, ui::DomKey::CHARACTER, 'D', ui::VKEY_D}},
+       {true, ui::DomKey::Constant<'d'>::Character, ui::VKEY_D},
+       {true, ui::DomKey::Constant<'D'>::Character, ui::VKEY_D}},
       {ui::DomCode::KEY_E,
-       {true, ui::DomKey::CHARACTER, 'e', ui::VKEY_E},
-       {true, ui::DomKey::CHARACTER, 'E', ui::VKEY_E}},
+       {true, ui::DomKey::Constant<'e'>::Character, ui::VKEY_E},
+       {true, ui::DomKey::Constant<'E'>::Character, ui::VKEY_E}},
       {ui::DomCode::KEY_F,
-       {true, ui::DomKey::CHARACTER, 'f', ui::VKEY_F},
-       {true, ui::DomKey::CHARACTER, 'F', ui::VKEY_F}},
+       {true, ui::DomKey::Constant<'f'>::Character, ui::VKEY_F},
+       {true, ui::DomKey::Constant<'F'>::Character, ui::VKEY_F}},
       {ui::DomCode::KEY_G,
-       {true, ui::DomKey::CHARACTER, 'g', ui::VKEY_G},
-       {true, ui::DomKey::CHARACTER, 'G', ui::VKEY_G}},
+       {true, ui::DomKey::Constant<'g'>::Character, ui::VKEY_G},
+       {true, ui::DomKey::Constant<'G'>::Character, ui::VKEY_G}},
       {ui::DomCode::KEY_H,
-       {true, ui::DomKey::CHARACTER, 'h', ui::VKEY_H},
-       {true, ui::DomKey::CHARACTER, 'H', ui::VKEY_H}},
+       {true, ui::DomKey::Constant<'h'>::Character, ui::VKEY_H},
+       {true, ui::DomKey::Constant<'H'>::Character, ui::VKEY_H}},
       {ui::DomCode::KEY_I,
-       {true, ui::DomKey::CHARACTER, 'i', ui::VKEY_I},
-       {true, ui::DomKey::CHARACTER, 'I', ui::VKEY_I}},
+       {true, ui::DomKey::Constant<'i'>::Character, ui::VKEY_I},
+       {true, ui::DomKey::Constant<'I'>::Character, ui::VKEY_I}},
       {ui::DomCode::KEY_J,
-       {true, ui::DomKey::CHARACTER, 'j', ui::VKEY_J},
-       {true, ui::DomKey::CHARACTER, 'J', ui::VKEY_J}},
+       {true, ui::DomKey::Constant<'j'>::Character, ui::VKEY_J},
+       {true, ui::DomKey::Constant<'J'>::Character, ui::VKEY_J}},
       {ui::DomCode::KEY_K,
-       {true, ui::DomKey::CHARACTER, 'k', ui::VKEY_K},
-       {true, ui::DomKey::CHARACTER, 'K', ui::VKEY_K}},
+       {true, ui::DomKey::Constant<'k'>::Character, ui::VKEY_K},
+       {true, ui::DomKey::Constant<'K'>::Character, ui::VKEY_K}},
       {ui::DomCode::KEY_L,
-       {true, ui::DomKey::CHARACTER, 'l', ui::VKEY_L},
-       {true, ui::DomKey::CHARACTER, 'L', ui::VKEY_L}},
+       {true, ui::DomKey::Constant<'l'>::Character, ui::VKEY_L},
+       {true, ui::DomKey::Constant<'L'>::Character, ui::VKEY_L}},
       {ui::DomCode::KEY_M,
-       {true, ui::DomKey::CHARACTER, 'm', ui::VKEY_M},
-       {true, ui::DomKey::CHARACTER, 'M', ui::VKEY_M}},
+       {true, ui::DomKey::Constant<'m'>::Character, ui::VKEY_M},
+       {true, ui::DomKey::Constant<'M'>::Character, ui::VKEY_M}},
       {ui::DomCode::KEY_N,
-       {true, ui::DomKey::CHARACTER, 'n', ui::VKEY_N},
-       {true, ui::DomKey::CHARACTER, 'N', ui::VKEY_N}},
+       {true, ui::DomKey::Constant<'n'>::Character, ui::VKEY_N},
+       {true, ui::DomKey::Constant<'N'>::Character, ui::VKEY_N}},
       {ui::DomCode::KEY_O,
-       {true, ui::DomKey::CHARACTER, 'o', ui::VKEY_O},
-       {true, ui::DomKey::CHARACTER, 'O', ui::VKEY_O}},
+       {true, ui::DomKey::Constant<'o'>::Character, ui::VKEY_O},
+       {true, ui::DomKey::Constant<'O'>::Character, ui::VKEY_O}},
       {ui::DomCode::KEY_P,
-       {true, ui::DomKey::CHARACTER, 'p', ui::VKEY_P},
-       {true, ui::DomKey::CHARACTER, 'P', ui::VKEY_P}},
+       {true, ui::DomKey::Constant<'p'>::Character, ui::VKEY_P},
+       {true, ui::DomKey::Constant<'P'>::Character, ui::VKEY_P}},
       {ui::DomCode::KEY_Q,
-       {true, ui::DomKey::CHARACTER, 'q', ui::VKEY_Q},
-       {true, ui::DomKey::CHARACTER, 'Q', ui::VKEY_Q}},
+       {true, ui::DomKey::Constant<'q'>::Character, ui::VKEY_Q},
+       {true, ui::DomKey::Constant<'Q'>::Character, ui::VKEY_Q}},
       {ui::DomCode::KEY_R,
-       {true, ui::DomKey::CHARACTER, 'r', ui::VKEY_R},
-       {true, ui::DomKey::CHARACTER, 'R', ui::VKEY_R}},
+       {true, ui::DomKey::Constant<'r'>::Character, ui::VKEY_R},
+       {true, ui::DomKey::Constant<'R'>::Character, ui::VKEY_R}},
       {ui::DomCode::KEY_S,
-       {true, ui::DomKey::CHARACTER, 's', ui::VKEY_S},
-       {true, ui::DomKey::CHARACTER, 'S', ui::VKEY_S}},
+       {true, ui::DomKey::Constant<'s'>::Character, ui::VKEY_S},
+       {true, ui::DomKey::Constant<'S'>::Character, ui::VKEY_S}},
       {ui::DomCode::KEY_T,
-       {true, ui::DomKey::CHARACTER, 't', ui::VKEY_T},
-       {true, ui::DomKey::CHARACTER, 'T', ui::VKEY_T}},
+       {true, ui::DomKey::Constant<'t'>::Character, ui::VKEY_T},
+       {true, ui::DomKey::Constant<'T'>::Character, ui::VKEY_T}},
       {ui::DomCode::KEY_U,
-       {true, ui::DomKey::CHARACTER, 'u', ui::VKEY_U},
-       {true, ui::DomKey::CHARACTER, 'U', ui::VKEY_U}},
+       {true, ui::DomKey::Constant<'u'>::Character, ui::VKEY_U},
+       {true, ui::DomKey::Constant<'U'>::Character, ui::VKEY_U}},
       {ui::DomCode::KEY_V,
-       {true, ui::DomKey::CHARACTER, 'v', ui::VKEY_V},
-       {true, ui::DomKey::CHARACTER, 'V', ui::VKEY_V}},
+       {true, ui::DomKey::Constant<'v'>::Character, ui::VKEY_V},
+       {true, ui::DomKey::Constant<'V'>::Character, ui::VKEY_V}},
       {ui::DomCode::KEY_W,
-       {true, ui::DomKey::CHARACTER, 'w', ui::VKEY_W},
-       {true, ui::DomKey::CHARACTER, 'W', ui::VKEY_W}},
+       {true, ui::DomKey::Constant<'w'>::Character, ui::VKEY_W},
+       {true, ui::DomKey::Constant<'W'>::Character, ui::VKEY_W}},
       {ui::DomCode::KEY_X,
-       {true, ui::DomKey::CHARACTER, 'x', ui::VKEY_X},
-       {true, ui::DomKey::CHARACTER, 'X', ui::VKEY_X}},
+       {true, ui::DomKey::Constant<'x'>::Character, ui::VKEY_X},
+       {true, ui::DomKey::Constant<'X'>::Character, ui::VKEY_X}},
       {ui::DomCode::KEY_Y,
-       {true, ui::DomKey::CHARACTER, 'y', ui::VKEY_Y},
-       {true, ui::DomKey::CHARACTER, 'Y', ui::VKEY_Y}},
+       {true, ui::DomKey::Constant<'y'>::Character, ui::VKEY_Y},
+       {true, ui::DomKey::Constant<'Y'>::Character, ui::VKEY_Y}},
       {ui::DomCode::KEY_Z,
-       {true, ui::DomKey::CHARACTER, 'z', ui::VKEY_Z},
-       {true, ui::DomKey::CHARACTER, 'Z', ui::VKEY_Z}},
+       {true, ui::DomKey::Constant<'z'>::Character, ui::VKEY_Z},
+       {true, ui::DomKey::Constant<'Z'>::Character, ui::VKEY_Z}},
       {ui::DomCode::DIGIT1,
-       {true, ui::DomKey::CHARACTER, '1', ui::VKEY_1},
-       {true, ui::DomKey::CHARACTER, '!', ui::VKEY_1}},
+       {true, ui::DomKey::Constant<'1'>::Character, ui::VKEY_1},
+       {true, ui::DomKey::Constant<'!'>::Character, ui::VKEY_1}},
       {ui::DomCode::DIGIT2,
-       {true, ui::DomKey::CHARACTER, '2', ui::VKEY_2},
-       {true, ui::DomKey::CHARACTER, '@', ui::VKEY_2}},
+       {true, ui::DomKey::Constant<'2'>::Character, ui::VKEY_2},
+       {true, ui::DomKey::Constant<'@'>::Character, ui::VKEY_2}},
       {ui::DomCode::DIGIT3,
-       {true, ui::DomKey::CHARACTER, '3', ui::VKEY_3},
-       {true, ui::DomKey::CHARACTER, '#', ui::VKEY_3}},
+       {true, ui::DomKey::Constant<'3'>::Character, ui::VKEY_3},
+       {true, ui::DomKey::Constant<'#'>::Character, ui::VKEY_3}},
       {ui::DomCode::DIGIT4,
-       {true, ui::DomKey::CHARACTER, '4', ui::VKEY_4},
-       {true, ui::DomKey::CHARACTER, '$', ui::VKEY_4}},
+       {true, ui::DomKey::Constant<'4'>::Character, ui::VKEY_4},
+       {true, ui::DomKey::Constant<'$'>::Character, ui::VKEY_4}},
       {ui::DomCode::DIGIT5,
-       {true, ui::DomKey::CHARACTER, '5', ui::VKEY_5},
-       {true, ui::DomKey::CHARACTER, '%', ui::VKEY_5}},
+       {true, ui::DomKey::Constant<'5'>::Character, ui::VKEY_5},
+       {true, ui::DomKey::Constant<'%'>::Character, ui::VKEY_5}},
       {ui::DomCode::DIGIT6,
-       {true, ui::DomKey::CHARACTER, '6', ui::VKEY_6},
-       {true, ui::DomKey::CHARACTER, '^', ui::VKEY_6}},
+       {true, ui::DomKey::Constant<'6'>::Character, ui::VKEY_6},
+       {true, ui::DomKey::Constant<'^'>::Character, ui::VKEY_6}},
       {ui::DomCode::DIGIT7,
-       {true, ui::DomKey::CHARACTER, '7', ui::VKEY_7},
-       {true, ui::DomKey::CHARACTER, '&', ui::VKEY_7}},
+       {true, ui::DomKey::Constant<'7'>::Character, ui::VKEY_7},
+       {true, ui::DomKey::Constant<'&'>::Character, ui::VKEY_7}},
       {ui::DomCode::DIGIT8,
-       {true, ui::DomKey::CHARACTER, '8', ui::VKEY_8},
-       {true, ui::DomKey::CHARACTER, '*', ui::VKEY_8}},
+       {true, ui::DomKey::Constant<'8'>::Character, ui::VKEY_8},
+       {true, ui::DomKey::Constant<'*'>::Character, ui::VKEY_8}},
       {ui::DomCode::DIGIT9,
-       {true, ui::DomKey::CHARACTER, '9', ui::VKEY_9},
-       {true, ui::DomKey::CHARACTER, '(', ui::VKEY_9}},
+       {true, ui::DomKey::Constant<'9'>::Character, ui::VKEY_9},
+       {true, ui::DomKey::Constant<'('>::Character, ui::VKEY_9}},
       {ui::DomCode::DIGIT0,
-       {true, ui::DomKey::CHARACTER, '0', ui::VKEY_0},
-       {true, ui::DomKey::CHARACTER, ')', ui::VKEY_0}},
+       {true, ui::DomKey::Constant<'0'>::Character, ui::VKEY_0},
+       {true, ui::DomKey::Constant<')'>::Character, ui::VKEY_0}},
       {ui::DomCode::SPACE,
-       {true, ui::DomKey::CHARACTER, ' ', ui::VKEY_SPACE},
-       {true, ui::DomKey::CHARACTER, ' ', ui::VKEY_SPACE}},
+       {true, ui::DomKey::Constant<' '>::Character, ui::VKEY_SPACE},
+       {true, ui::DomKey::Constant<' '>::Character, ui::VKEY_SPACE}},
       {ui::DomCode::MINUS,
-       {true, ui::DomKey::CHARACTER, '-', ui::VKEY_OEM_MINUS},
-       {true, ui::DomKey::CHARACTER, '_', ui::VKEY_OEM_MINUS}},
+       {true, ui::DomKey::Constant<'-'>::Character, ui::VKEY_OEM_MINUS},
+       {true, ui::DomKey::Constant<'_'>::Character, ui::VKEY_OEM_MINUS}},
       {ui::DomCode::EQUAL,
-       {true, ui::DomKey::CHARACTER, '=', ui::VKEY_OEM_PLUS},
-       {true, ui::DomKey::CHARACTER, '+', ui::VKEY_OEM_PLUS}},
+       {true, ui::DomKey::Constant<'='>::Character, ui::VKEY_OEM_PLUS},
+       {true, ui::DomKey::Constant<'+'>::Character, ui::VKEY_OEM_PLUS}},
       {ui::DomCode::BRACKET_LEFT,
-       {true, ui::DomKey::CHARACTER, '[', ui::VKEY_OEM_4},
-       {true, ui::DomKey::CHARACTER, '{', ui::VKEY_OEM_4}},
+       {true, ui::DomKey::Constant<'['>::Character, ui::VKEY_OEM_4},
+       {true, ui::DomKey::Constant<'{'>::Character, ui::VKEY_OEM_4}},
       {ui::DomCode::BRACKET_RIGHT,
-       {true, ui::DomKey::CHARACTER, ']', ui::VKEY_OEM_6},
-       {true, ui::DomKey::CHARACTER, '}', ui::VKEY_OEM_6}},
+       {true, ui::DomKey::Constant<']'>::Character, ui::VKEY_OEM_6},
+       {true, ui::DomKey::Constant<'}'>::Character, ui::VKEY_OEM_6}},
       {ui::DomCode::BACKSLASH,
-       {true, ui::DomKey::CHARACTER, '\\', ui::VKEY_OEM_5},
-       {true, ui::DomKey::CHARACTER, '|', ui::VKEY_OEM_5}},
+       {true, ui::DomKey::Constant<'\\'>::Character, ui::VKEY_OEM_5},
+       {true, ui::DomKey::Constant<'|'>::Character, ui::VKEY_OEM_5}},
       {ui::DomCode::SEMICOLON,
-       {true, ui::DomKey::CHARACTER, ';', ui::VKEY_OEM_1},
-       {true, ui::DomKey::CHARACTER, ':', ui::VKEY_OEM_1}},
+       {true, ui::DomKey::Constant<';'>::Character, ui::VKEY_OEM_1},
+       {true, ui::DomKey::Constant<':'>::Character, ui::VKEY_OEM_1}},
       {ui::DomCode::QUOTE,
-       {true, ui::DomKey::CHARACTER, '\'', ui::VKEY_OEM_7},
-       {true, ui::DomKey::CHARACTER, '"', ui::VKEY_OEM_7}},
+       {true, ui::DomKey::Constant<'\''>::Character, ui::VKEY_OEM_7},
+       {true, ui::DomKey::Constant<'"'>::Character, ui::VKEY_OEM_7}},
       {ui::DomCode::BACKQUOTE,
-       {true, ui::DomKey::CHARACTER, '`', ui::VKEY_OEM_3},
-       {true, ui::DomKey::CHARACTER, '~', ui::VKEY_OEM_3}},
+       {true, ui::DomKey::Constant<'`'>::Character, ui::VKEY_OEM_3},
+       {true, ui::DomKey::Constant<'~'>::Character, ui::VKEY_OEM_3}},
       {ui::DomCode::COMMA,
-       {true, ui::DomKey::CHARACTER, ',', ui::VKEY_OEM_COMMA},
-       {true, ui::DomKey::CHARACTER, '<', ui::VKEY_OEM_COMMA}},
+       {true, ui::DomKey::Constant<','>::Character, ui::VKEY_OEM_COMMA},
+       {true, ui::DomKey::Constant<'<'>::Character, ui::VKEY_OEM_COMMA}},
       {ui::DomCode::PERIOD,
-       {true, ui::DomKey::CHARACTER, '.', ui::VKEY_OEM_PERIOD},
-       {true, ui::DomKey::CHARACTER, '>', ui::VKEY_OEM_PERIOD}},
+       {true, ui::DomKey::Constant<'.'>::Character, ui::VKEY_OEM_PERIOD},
+       {true, ui::DomKey::Constant<'>'>::Character, ui::VKEY_OEM_PERIOD}},
       {ui::DomCode::SLASH,
-       {true, ui::DomKey::CHARACTER, '/', ui::VKEY_OEM_2},
-       {true, ui::DomKey::CHARACTER, '?', ui::VKEY_OEM_2}},
+       {true, ui::DomKey::Constant<'/'>::Character, ui::VKEY_OEM_2},
+       {true, ui::DomKey::Constant<'?'>::Character, ui::VKEY_OEM_2}},
       {ui::DomCode::INTL_BACKSLASH,
-       {true, ui::DomKey::CHARACTER, '<', ui::VKEY_OEM_102},
-       {true, ui::DomKey::CHARACTER, '>', ui::VKEY_OEM_102}},
+       {true, ui::DomKey::Constant<'<'>::Character, ui::VKEY_OEM_102},
+       {true, ui::DomKey::Constant<'>'>::Character, ui::VKEY_OEM_102}},
       {ui::DomCode::INTL_YEN,
-       {true, ui::DomKey::CHARACTER, 0x00A5, ui::VKEY_OEM_5},
-       {true, ui::DomKey::CHARACTER, '|', ui::VKEY_OEM_5}},
+       {true, ui::DomKey::Constant<0x00A5>::Character, ui::VKEY_OEM_5},
+       {true, ui::DomKey::Constant<'|'>::Character, ui::VKEY_OEM_5}},
       {ui::DomCode::NUMPAD_DIVIDE,
-       {true, ui::DomKey::CHARACTER, '/', ui::VKEY_DIVIDE},
-       {true, ui::DomKey::CHARACTER, '/', ui::VKEY_DIVIDE}},
+       {true, ui::DomKey::Constant<'/'>::Character, ui::VKEY_DIVIDE},
+       {true, ui::DomKey::Constant<'/'>::Character, ui::VKEY_DIVIDE}},
       {ui::DomCode::NUMPAD_MULTIPLY,
-       {true, ui::DomKey::CHARACTER, '*', ui::VKEY_MULTIPLY},
-       {true, ui::DomKey::CHARACTER, '*', ui::VKEY_MULTIPLY}},
+       {true, ui::DomKey::Constant<'*'>::Character, ui::VKEY_MULTIPLY},
+       {true, ui::DomKey::Constant<'*'>::Character, ui::VKEY_MULTIPLY}},
       {ui::DomCode::NUMPAD_SUBTRACT,
-       {true, ui::DomKey::CHARACTER, '-', ui::VKEY_SUBTRACT},
-       {true, ui::DomKey::CHARACTER, '-', ui::VKEY_SUBTRACT}},
+       {true, ui::DomKey::Constant<'-'>::Character, ui::VKEY_SUBTRACT},
+       {true, ui::DomKey::Constant<'-'>::Character, ui::VKEY_SUBTRACT}},
       {ui::DomCode::NUMPAD_ADD,
-       {true, ui::DomKey::CHARACTER, '+', ui::VKEY_ADD},
-       {true, ui::DomKey::CHARACTER, '+', ui::VKEY_ADD}},
+       {true, ui::DomKey::Constant<'+'>::Character, ui::VKEY_ADD},
+       {true, ui::DomKey::Constant<'+'>::Character, ui::VKEY_ADD}},
       {ui::DomCode::NUMPAD1,
-       {true, ui::DomKey::CHARACTER, '1', ui::VKEY_1},
-       {true, ui::DomKey::CHARACTER, '1', ui::VKEY_1}},
+       {true, ui::DomKey::Constant<'1'>::Character, ui::VKEY_1},
+       {true, ui::DomKey::Constant<'1'>::Character, ui::VKEY_1}},
       {ui::DomCode::NUMPAD2,
-       {true, ui::DomKey::CHARACTER, '2', ui::VKEY_2},
-       {true, ui::DomKey::CHARACTER, '2', ui::VKEY_2}},
+       {true, ui::DomKey::Constant<'2'>::Character, ui::VKEY_2},
+       {true, ui::DomKey::Constant<'2'>::Character, ui::VKEY_2}},
       {ui::DomCode::NUMPAD3,
-       {true, ui::DomKey::CHARACTER, '3', ui::VKEY_3},
-       {true, ui::DomKey::CHARACTER, '3', ui::VKEY_3}},
+       {true, ui::DomKey::Constant<'3'>::Character, ui::VKEY_3},
+       {true, ui::DomKey::Constant<'3'>::Character, ui::VKEY_3}},
       {ui::DomCode::NUMPAD4,
-       {true, ui::DomKey::CHARACTER, '4', ui::VKEY_4},
-       {true, ui::DomKey::CHARACTER, '4', ui::VKEY_4}},
+       {true, ui::DomKey::Constant<'4'>::Character, ui::VKEY_4},
+       {true, ui::DomKey::Constant<'4'>::Character, ui::VKEY_4}},
       {ui::DomCode::NUMPAD5,
-       {true, ui::DomKey::CHARACTER, '5', ui::VKEY_5},
-       {true, ui::DomKey::CHARACTER, '5', ui::VKEY_5}},
+       {true, ui::DomKey::Constant<'5'>::Character, ui::VKEY_5},
+       {true, ui::DomKey::Constant<'5'>::Character, ui::VKEY_5}},
       {ui::DomCode::NUMPAD6,
-       {true, ui::DomKey::CHARACTER, '6', ui::VKEY_6},
-       {true, ui::DomKey::CHARACTER, '6', ui::VKEY_6}},
+       {true, ui::DomKey::Constant<'6'>::Character, ui::VKEY_6},
+       {true, ui::DomKey::Constant<'6'>::Character, ui::VKEY_6}},
       {ui::DomCode::NUMPAD7,
-       {true, ui::DomKey::CHARACTER, '7', ui::VKEY_7},
-       {true, ui::DomKey::CHARACTER, '7', ui::VKEY_7}},
+       {true, ui::DomKey::Constant<'7'>::Character, ui::VKEY_7},
+       {true, ui::DomKey::Constant<'7'>::Character, ui::VKEY_7}},
       {ui::DomCode::NUMPAD8,
-       {true, ui::DomKey::CHARACTER, '8', ui::VKEY_8},
-       {true, ui::DomKey::CHARACTER, '8', ui::VKEY_8}},
+       {true, ui::DomKey::Constant<'8'>::Character, ui::VKEY_8},
+       {true, ui::DomKey::Constant<'8'>::Character, ui::VKEY_8}},
       {ui::DomCode::NUMPAD9,
-       {true, ui::DomKey::CHARACTER, '9', ui::VKEY_9},
-       {true, ui::DomKey::CHARACTER, '9', ui::VKEY_9}},
+       {true, ui::DomKey::Constant<'9'>::Character, ui::VKEY_9},
+       {true, ui::DomKey::Constant<'9'>::Character, ui::VKEY_9}},
       {ui::DomCode::NUMPAD0,
-       {true, ui::DomKey::CHARACTER, '0', ui::VKEY_0},
-       {true, ui::DomKey::CHARACTER, '0', ui::VKEY_0}},
+       {true, ui::DomKey::Constant<'0'>::Character, ui::VKEY_0},
+       {true, ui::DomKey::Constant<'0'>::Character, ui::VKEY_0}},
       {ui::DomCode::NUMPAD_DECIMAL,
-       {true, ui::DomKey::CHARACTER, '.', ui::VKEY_DECIMAL},
-       {true, ui::DomKey::CHARACTER, '.', ui::VKEY_DECIMAL}},
+       {true, ui::DomKey::Constant<'.'>::Character, ui::VKEY_DECIMAL},
+       {true, ui::DomKey::Constant<'.'>::Character, ui::VKEY_DECIMAL}},
       {ui::DomCode::NUMPAD_EQUAL,
-       {true, ui::DomKey::CHARACTER, '=', ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, '=', ui::VKEY_UNKNOWN}},
+       {true, ui::DomKey::Constant<'='>::Character, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<'='>::Character, ui::VKEY_UNKNOWN}},
       {ui::DomCode::NUMPAD_COMMA,
-       {true, ui::DomKey::CHARACTER, ',', ui::VKEY_OEM_COMMA},
-       {true, ui::DomKey::CHARACTER, ',', ui::VKEY_OEM_COMMA}},
+       {true, ui::DomKey::Constant<','>::Character, ui::VKEY_OEM_COMMA},
+       {true, ui::DomKey::Constant<','>::Character, ui::VKEY_OEM_COMMA}},
       {ui::DomCode::NUMPAD_PAREN_LEFT,
-       {true, ui::DomKey::CHARACTER, '(', ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, '(', ui::VKEY_UNKNOWN}},
+       {true, ui::DomKey::Constant<'('>::Character, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<'('>::Character, ui::VKEY_UNKNOWN}},
       {ui::DomCode::NUMPAD_PAREN_RIGHT,
-       {true, ui::DomKey::CHARACTER, ')', ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, ')', ui::VKEY_UNKNOWN}},
+       {true, ui::DomKey::Constant<')'>::Character, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<')'>::Character, ui::VKEY_UNKNOWN}},
       {ui::DomCode::NUMPAD_SIGN_CHANGE,
-       {true, ui::DomKey::CHARACTER, 0xB1, ui::VKEY_UNKNOWN},
-       {true, ui::DomKey::CHARACTER, 0xB1, ui::VKEY_UNKNOWN}},
+       {true, ui::DomKey::Constant<0xB1>::Character, ui::VKEY_UNKNOWN},
+       {true, ui::DomKey::Constant<0xB1>::Character, ui::VKEY_UNKNOWN}},
   };
 
   for (const auto& it : kPrintableUsLayout) {
-    CheckDomCodeToMeaning("p_us_n", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("p_us_n", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_NONE, it.normal);
-    CheckDomCodeToMeaning("p_us_s", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("p_us_s", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_SHIFT_DOWN, it.shift);
-    CheckDomCodeToMeaning("p_us_a", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("p_us_a", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_ALTGR_DOWN, it.normal);
-    CheckDomCodeToMeaning("p_us_a", ui::DomCodeToUsLayoutMeaning, it.dom_code,
+    CheckDomCodeToMeaning("p_us_a", ui::DomCodeToUsLayoutDomKey, it.dom_code,
                           ui::EF_ALTGR_DOWN|ui::EF_SHIFT_DOWN, it.shift);
   }
 }
 
 TEST(KeyboardCodeConversion, Tables) {
   // Verify that kDomCodeToKeyboardCodeMap is ordered by DomCode value.
   uint32_t previous = 0;
   for (const auto& it : ui::kDomCodeToKeyboardCodeMap) {
     uint32_t current = static_cast<uint32_t>(it.dom_code);
     EXPECT_LT(previous, current);
     previous = current;
   }
 }
 
 }  // namespace