Adding support for DOM3 KeyboardEvents Code in KeyboardEvents

Source/web/WebInputEventConversion.cpp

Index: Source/web/WebInputEventConversion.cpp
diff --git a/Source/web/WebInputEventConversion.cpp b/Source/web/WebInputEventConversion.cpp
index 4702c74390999bfc52949a21bc972849ef98e1cc..7a57acd0715220975abbd343ee3a98bad4bb6b87 100644
--- a/Source/web/WebInputEventConversion.cpp
+++ b/Source/web/WebInputEventConversion.cpp
@@ -303,6 +303,7 @@ PlatformKeyboardEventBuilder::PlatformKeyboardEventBuilder(const WebKeyboardEven
     m_keyIdentifier = String(e.keyIdentifier);
     m_autoRepeat = (e.modifiers & WebInputEvent::IsAutoRepeat);
     m_nativeVirtualKeyCode = e.nativeKeyCode;
+    m_usbCode = e.usbCode;
     m_isKeypad = (e.modifiers & WebInputEvent::IsKeyPad);
     m_isSystemKey = e.isSystemKey;
 
@@ -685,6 +686,8 @@ WebKeyboardEventBuilder::WebKeyboardEventBuilder(const KeyboardEvent& event)
     if (!event.keyEvent())
         return;
     nativeKeyCode = event.keyEvent()->nativeVirtualKeyCode();
+    usbCode = event.keyEvent()->usbKeyCode();
+
     unsigned numberOfCharacters = std::min(event.keyEvent()->text().length(), static_cast<unsigned>(textLengthCap));
     for (unsigned i = 0; i < numberOfCharacters; ++i) {
         text[i] = event.keyEvent()->text()[i];
@@ -733,6 +736,7 @@ WebKeyboardEventBuilder::WebKeyboardEventBuilder(const PlatformKeyboardEvent& ev
         modifiers |= WebInputEvent::IsKeyPad;
     isSystemKey = event.isSystemKey();
     nativeKeyCode = event.nativeVirtualKeyCode();
+    usbCode = event.usbKeyCode();
 
     windowsKeyCode = windowsKeyCodeWithoutLocation(event.windowsVirtualKeyCode());
     modifiers |= locationModifiersFromWindowsKeyCode(event.windowsVirtualKeyCode());