Set WebKeyboardEvent.domCode on Windows.

BUG=489446

Review URL: https://codereview.chromium.org/1147843003

Cr-Commit-Position: refs/heads/master@{#330586}

content/browser/renderer_host/web_input_event_aura.cc

@@ -273,7 +273,10 @@ blink::WebKeyboardEvent MakeWebKeyboardEvent(const ui::KeyEvent& event) {
 #if defined(OS_WIN)
   if (event.HasNativeEvent()) {
     // Key events require no translation by the aura system.
-    return MakeWebKeyboardEventFromNativeEvent(event.native_event());
+    blink::WebKeyboardEvent webkit_event(
+        MakeWebKeyboardEventFromNativeEvent(event.native_event()));
+    webkit_event.domCode = static_cast<int>(event.code());
+    return webkit_event;
   }
 #endif
   return MakeWebKeyboardEventFromAuraEvent(event);

content/browser/renderer_host/web_input_event_aura_unittest.cc

@@ -32,6 +32,8 @@ TEST(WebInputEventAuraTest, TestMakeWebKeyboardEvent) {
     // However, modifier bit for Control in |webkit_event| should be set.
     EXPECT_EQ(blink::WebInputEvent::ControlKey | blink::WebInputEvent::IsLeft,
               webkit_event.modifiers);
+    EXPECT_EQ(static_cast<int>(ui::DomCode::CONTROL_LEFT),
+              webkit_event.domCode);
   }
   {
     // Release Ctrl.
@@ -40,6 +42,8 @@ TEST(WebInputEventAuraTest, TestMakeWebKeyboardEvent) {
     blink::WebKeyboardEvent webkit_event = MakeWebKeyboardEvent(event);
     // However, modifier bit for Control in |webkit_event| shouldn't be set.
     EXPECT_EQ(blink::WebInputEvent::IsLeft, webkit_event.modifiers);
+    EXPECT_EQ(static_cast<int>(ui::DomCode::CONTROL_LEFT),
+              webkit_event.domCode);
   }
 #if defined(USE_X11)
   const int kLocationModifiers =