Implement HTML selects as native Cocoa controls for Chrome

chrome/browser/renderer_host/render_widget_host_view_mac.h

Index: chrome/browser/renderer_host/render_widget_host_view_mac.h
===================================================================
--- chrome/browser/renderer_host/render_widget_host_view_mac.h	(revision 14463)
+++ chrome/browser/renderer_host/render_widget_host_view_mac.h	(working copy)
@@ -82,9 +82,15 @@
   virtual void Destroy();
   virtual void SetTooltipText(const std::wstring& tooltip_text);
   virtual BackingStore* AllocBackingStore(const gfx::Size& size);
+  virtual void ShowPopupWithItems(gfx::Rect bounds,
+                                  int item_height,
+                                  int selected_item,
+                                  const std::vector<WebMenuItem>& items);
 
   void KillSelf();
 
+  void set_parent_view(BaseView* parent_view) { parent_view_ = parent_view; }
+
   // These member variables should be private, but the associated ObjC class
   // needs access to them and can't be made a friend.
 
@@ -131,6 +137,9 @@
   // Factory used to safely scope delayed calls to ShutdownHost().
   ScopedRunnableMethodFactory<RenderWidgetHostViewMac> shutdown_factory_;
 
+  // Used for positioning a popup menu.
+  BaseView* parent_view_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };