ozone: evdev: Add DOM3 code string to Ozone evdev key events.

Have ui::KeycodeConverter::NativeKeycode use evdev codes when
compiled appropriately.

TEST=Manually tested on link_freon.
BUG=362698

Review URL: https://codereview.chromium.org/488123004

Cr-Commit-Position: refs/heads/master@{#292251}

ui/events/ozone/evdev/key_event_converter_evdev.cc

@@ -9,6 +9,7 @@
 
 #include "base/message_loop/message_loop.h"
 #include "ui/events/event.h"
+#include "ui/events/keycodes/dom4/keycode_converter.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/events/ozone/evdev/event_modifiers_evdev.h"
 
@@ -16,6 +17,8 @@ namespace ui {
 
 namespace {
 
+const int kXkbKeycodeOffset = 8;
+
 ui::KeyboardCode KeyboardCodeFromButton(unsigned int code) {
   static const ui::KeyboardCode kLinuxBaseKeyMap[] = {
       ui::VKEY_UNKNOWN,            // KEY_RESERVED
@@ -262,7 +265,11 @@ void KeyEventConverterEvdev::ConvertKeyEvent(int key, int value) {
 
   int flags = modifiers_->GetModifierFlags();
 
-  KeyEvent key_event(down ? ET_KEY_PRESSED : ET_KEY_RELEASED, code, flags);
+  KeyEvent key_event(
+      down ? ET_KEY_PRESSED : ET_KEY_RELEASED,
+      code,
+      KeycodeConverter::NativeKeycodeToCode(key + kXkbKeycodeOffset),
+      flags);
   DispatchEventToCallback(&key_event);
 }
 

ui/events/ozone/events_ozone.gyp

@@ -46,6 +46,7 @@
       '../../../base/base.gyp:base',
       '../../gfx/gfx.gyp:gfx',
       '../../ozone/ozone.gyp:ozone_base',
+      '../events.gyp:dom4_keycode_converter',
       '../platform/events_platform.gyp:events_platform',
       'events_ozone',
     ],