Use standard DOM code definitions instead of custom.

remoting/host/input_injector_x11.cc

Index: remoting/host/input_injector_x11.cc
diff --git a/remoting/host/input_injector_x11.cc b/remoting/host/input_injector_x11.cc
index 62e13a17ecbfc42da6c674cc4904e6458494cbce..fc0c712d3f9891b5e3e93aefe56ba59c5670e3d7 100644
--- a/remoting/host/input_injector_x11.cc
+++ b/remoting/host/input_injector_x11.cc
@@ -25,8 +25,8 @@
 #include "remoting/host/clipboard.h"
 #include "remoting/host/linux/unicode_to_keysym.h"
 #include "remoting/proto/internal.pb.h"
-#include "remoting/protocol/usb_key_codes.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
+#include "ui/events/keycodes/dom/dom_code.h"
 #include "ui/events/keycodes/dom/keycode_converter.h"
 
 namespace remoting {
@@ -89,15 +89,15 @@ bool FindKeycodeForUnicode(Display* display,
   return false;
 }
 
-bool IsModifierKey(int usb_keycode) {
-  return usb_keycode == kUsbLeftControl ||
-         usb_keycode == kUsbLeftShift ||
-         usb_keycode == kUsbLeftAlt ||
-         usb_keycode == kUsbLeftOs ||
-         usb_keycode == kUsbRightControl ||
-         usb_keycode == kUsbRightShift ||
-         usb_keycode == kUsbRightAlt ||
-         usb_keycode == kUsbRightOs;
+bool IsModifierKey(ui::DomCode dom_code) {
+  return dom_code == ui::DomCode::CONTROL_LEFT ||
+         dom_code == ui::DomCode::SHIFT_LEFT ||
+         dom_code == ui::DomCode::ALT_LEFT ||
+         dom_code == ui::DomCode::OS_LEFT ||
+         dom_code == ui::DomCode::CONTROL_RIGHT ||
+         dom_code == ui::DomCode::SHIFT_RIGHT ||
+         dom_code == ui::DomCode::ALT_RIGHT ||
+         dom_code == ui::DomCode::OS_RIGHT;
 }
 
 // Pixel-to-wheel-ticks conversion ratio used by GTK.
@@ -314,7 +314,7 @@ void InputInjectorX11::Core::InjectKeyEvent(const KeyEvent& event) {
   if (event.pressed()) {
     if (pressed_keys_.find(keycode) != pressed_keys_.end()) {
       // Ignore repeats for modifier keys.
-      if (IsModifierKey(event.usb_keycode()))
+      if (IsModifierKey(static_cast<ui::DomCode>(event.usb_keycode())))
         return;
       // Key is already held down, so lift the key up to ensure this repeated
       // press takes effect.