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

ui/events/keycodes/keyboard_code_conversion_xkb.cc

Index: ui/events/keycodes/keyboard_code_conversion_xkb.cc
diff --git a/ui/events/keycodes/keyboard_code_conversion_xkb.cc b/ui/events/keycodes/keyboard_code_conversion_xkb.cc
index b84988a1ed993d59308dff5d6a890010cb571c38..6e901e6aa4a0074a017fcf93dffef9582903d8f7 100644
--- a/ui/events/keycodes/keyboard_code_conversion_xkb.cc
+++ b/ui/events/keycodes/keyboard_code_conversion_xkb.cc
@@ -7,6 +7,10 @@
 #include "ui/events/keycodes/dom/dom_key.h"
 #include "ui/events/keycodes/keyboard_code_conversion.h"
 
+#ifndef XK_dead_greek
+#define XK_dead_greek 0xfe8c
+#endif
+
 namespace ui {
 
 DomKey NonPrintableXKeySymToDomKey(xkb_keysym_t keysym) {
@@ -353,36 +357,71 @@ DomKey NonPrintableXKeySymToDomKey(xkb_keysym_t keysym) {
     case XKB_KEY_ISO_Last_Group:
       return DomKey::GROUP_LAST;
     case XKB_KEY_dead_grave:
+      return DomKey::Dead(0x0300);  // combining grave accent
     case XKB_KEY_dead_acute:
+      return DomKey::Dead(0x0301);  // combining acute accent
     case XKB_KEY_dead_circumflex:
+      return DomKey::Dead(0x0302);  // combining circumflex accent
     case XKB_KEY_dead_tilde:
+      return DomKey::Dead(0x0303);  // combining tilde
     case XKB_KEY_dead_macron:
+      return DomKey::Dead(0x0304);  // combining macron
     case XKB_KEY_dead_breve:
+      return DomKey::Dead(0x0306);  // combining breve
     case XKB_KEY_dead_abovedot:
+      return DomKey::Dead(0x0307);  // combining dot above
     case XKB_KEY_dead_diaeresis:
+      return DomKey::Dead(0x0308);  // combining diaeresis
     case XKB_KEY_dead_abovering:
+      return DomKey::Dead(0x030A);  // combining ring above
     case XKB_KEY_dead_doubleacute:
+      return DomKey::Dead(0x030B);  // combining double acute accent
     case XKB_KEY_dead_caron:
+      return DomKey::Dead(0x030C);  // combining caron
     case XKB_KEY_dead_cedilla:
+      return DomKey::Dead(0x0327);  // combining cedilla
     case XKB_KEY_dead_ogonek:
+      return DomKey::Dead(0x0328);  // combining ogonek
     case XKB_KEY_dead_iota:
+      return DomKey::Dead(0x0345);  // combining greek ypogegrammeni
+    case XKB_KEY_dead_voiced_sound:
+      return DomKey::Dead(0x3099);  // combining voiced sound mark
+    case XKB_KEY_dead_semivoiced_sound:
+      return DomKey::Dead(0x309A);  // combining semi-voiced sound mark
     case XKB_KEY_dead_belowdot:
+      return DomKey::Dead(0x0323);  // combining dot below
     case XKB_KEY_dead_hook:
+      return DomKey::Dead(0x0309);  // combining hook above
     case XKB_KEY_dead_horn:
+      return DomKey::Dead(0x031B);  // combining horn
     case XKB_KEY_dead_stroke:
+      return DomKey::Dead(0x0338);  // combining long solidus overlay
     case XKB_KEY_dead_abovecomma:
+      return DomKey::Dead(0x0313);  // combining comma above
     case XKB_KEY_dead_abovereversedcomma:
+      return DomKey::Dead(0x0314);  // combining reversed comma above
     case XKB_KEY_dead_doublegrave:
+      return DomKey::Dead(0x030F);  // combining double grave accent
     case XKB_KEY_dead_belowring:
+      return DomKey::Dead(0x0325);  // combining ring below
     case XKB_KEY_dead_belowmacron:
+      return DomKey::Dead(0x0331);  // combining macron below
     case XKB_KEY_dead_belowcircumflex:
+      return DomKey::Dead(0x032D);  // combining circumflex accent below
     case XKB_KEY_dead_belowtilde:
+      return DomKey::Dead(0x0330);  // combining tilde below
     case XKB_KEY_dead_belowbreve:
+      return DomKey::Dead(0x032E);  // combining breve below
     case XKB_KEY_dead_belowdiaeresis:
+      return DomKey::Dead(0x0324);  // combining diaeresis below
     case XKB_KEY_dead_invertedbreve:
+      return DomKey::Dead(0x0311);  // combining inverted breve
     case XKB_KEY_dead_belowcomma:
+      return DomKey::Dead(0x0326);  // combining comma below
     case XKB_KEY_dead_currency:
-      return DomKey::DEAD;
+      return DomKey::Dead(0x00A4);  // currency sign
+    case XKB_KEY_dead_greek:
+      return DomKey::Dead(0x037E);  // greek question mark
     default:
       return DomKey::NONE;
   }
@@ -390,9 +429,9 @@ DomKey NonPrintableXKeySymToDomKey(xkb_keysym_t keysym) {
 
 DomKey XKeySymToDomKey(xkb_keysym_t keysym, base::char16 character) {
   DomKey dom_key = NonPrintableXKeySymToDomKey(keysym);
-  if (dom_key == DomKey::NONE)
-    dom_key = CharacterToDomKey(character);
-  return dom_key;
+  if (dom_key != DomKey::NONE)
+    return dom_key;
+  return DomKey::FromCharacter(character);
 }
 
 }  // namespace ui