Implement <select> Popup Menu using PagePopup

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index 7c67fd1ac9386dd3f9241f5b3f543e7aba5963ba..76ce263a6107f4ff55e56c50a547dfd85815c738 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -91,6 +91,7 @@
 #include "web/ExternalDateTimeChooser.h"
 #include "web/ExternalPopupMenu.h"
 #include "web/PopupMenuChromium.h"
+#include "web/PopupMenuImpl.h"
 #include "web/WebFileChooserCompletionImpl.h"
 #include "web/WebInputEventConversion.h"
 #include "web/WebLocalFrameImpl.h"
@@ -729,6 +730,9 @@ PassRefPtrWillBeRawPtr<PopupMenu> ChromeClientImpl::createPopupMenu(LocalFrame&
     if (WebViewImpl::useExternalPopupMenus())
         return adoptRefWillBeNoop(new ExternalPopupMenu(frame, client, *m_webView));
 
+    if (RuntimeEnabledFeatures::htmlPopupMenuEnabled() && RuntimeEnabledFeatures::pagePopupEnabled())
+        return PopupMenuImpl::create(this, client);
+
     return adoptRefWillBeNoop(new PopupMenuChromium(frame, client));
 }