Allow embedders to provide a custom view for popup (select box) widgets,

content/browser/web_contents/web_contents_view_gtk.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_GTK_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <vector>
@@ skipping 31 matching lines @@
 
   WebContentsViewDelegate* delegate() const { return delegate_.get(); }
   WebContents* web_contents();
 
   // WebContentsView implementation --------------------------------------------
 
   virtual void CreateView(
       const gfx::Size& initial_size, gfx::NativeView context) OVERRIDE;
   virtual RenderWidgetHostView* CreateViewForWidget(
       RenderWidgetHost* render_widget_host) OVERRIDE;
+  virtual RenderWidgetHostView* CreateViewForPopupWidget(
+      RenderWidgetHost* render_widget_host) OVERRIDE;
   virtual gfx::NativeView GetNativeView() const OVERRIDE;
   virtual gfx::NativeView GetContentNativeView() const OVERRIDE;
   virtual gfx::NativeWindow GetTopLevelNativeWindow() const OVERRIDE;
   virtual void GetContainerBounds(gfx::Rect* out) const OVERRIDE;
   virtual void SetPageTitle(const string16& title) OVERRIDE;
   virtual void OnTabCrashed(base::TerminationStatus status,
                             int error_code) OVERRIDE;
   virtual void SizeContents(const gfx::Size& size) OVERRIDE;
   virtual void RenderViewCreated(RenderViewHost* host) OVERRIDE;
   virtual void Focus() OVERRIDE;
@@ skipping 70 matching lines @@
   // The size we want the view to be.  We keep this in a separate variable
   // because resizing in GTK+ is async.
   gfx::Size requested_size_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewGtk);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_GTK_H_