Implement <select> Popup Menu using PagePopup

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index 8229f02da34f3fd48b87772a7d4344c4887f4b33..e1d4e11193787ddf05fc1d85b5d7c8d7e82b99f0 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -68,7 +68,6 @@ class DataObject;
 class Frame;
 class FullscreenController;
 class LinkHighlight;
-class PopupContainer;
 class RenderLayerCompositor;
 class UserGestureToken;
 class WebActiveGestureAnimation;
@@ -414,8 +413,6 @@ public:
         const WebPoint& dragImageOffset);
 
     // Notification that a popup was opened/closed.
-    void popupOpened(PopupContainer*);
-    void popupClosed(PopupContainer*);
     PagePopup* openPagePopup(PagePopupClient*, const IntRect& originBoundsInRootView);
     void closePagePopup(PagePopup*);
     LocalDOMWindow* pagePopupWindow() const;
@@ -437,8 +434,7 @@ public:
 
     virtual void setVisibilityState(WebPageVisibilityState, bool) override;
 
-    PopupContainer* selectPopup() const { return m_selectPopup.get(); }
-    bool hasOpenedPopup() const { return m_selectPopup || m_pagePopup; }
+    bool hasOpenedPopup() const { return m_pagePopup; }
 
     // Returns true if the event leads to scrolling.
     static bool mapKeyCodeForScroll(
@@ -566,8 +562,6 @@ private:
     // Returns true if the view was scrolled.
     bool scrollViewWithKeyboard(int keyCode, int modifiers);
 
-    void hideSelectPopup();
-
     // Converts |pos| from window coordinates to contents coordinates and gets
     // the HitTestResult for it.
     HitTestResult hitTestResultForWindowPos(const IntPoint&);
@@ -697,9 +691,6 @@ private:
     // current drop target in this WebView (the drop target can accept the drop).
     WebDragOperation m_dragOperation;
 
-    // The popup associated with a select element.
-    RefPtrWillBePersistent<PopupContainer> m_selectPopup;
-
     // The popup associated with an input element.
     RefPtr<WebPagePopupImpl> m_pagePopup;