Move ContextMenuParams struct from webkit/glue to content/public/common. The reasons are:

content/browser/tab_contents/tab_contents_view_wrapper_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_TAB_CONTENTS_TAB_CONTENTS_VIEW_WRAPPER_GTK_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_WRAPPER_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
 #include "content/common/content_export.h"
 #include "ui/gfx/native_widget_types.h"
 
-struct ContextMenuParams;
 
 namespace content {
 
 class TabContentsViewGtk;
+struct ContextMenuParams;
 
 // An object that supplies the Gtk parent of TabContentsViewGtk. Embedders may
 // want to insert widgets that provide features that live with the
 // TabContentsViewGtk.
 class CONTENT_EXPORT TabContentsViewWrapperGtk {
  public:
   // Initializes the TabContentsViewGtkWrapper by taking |view| and adding it
   // this object's GtkContainer.
   virtual void WrapView(TabContentsViewGtk* view) = 0;
 
@@ skipping 11 matching lines @@
   // Gives TabContentsViewGtkWrapper a first chance at focus events from our
   // render widget host, before the main view invokes its default
   // behaviour. Returns TRUE if |return_value| has been set and that value
   // should be returned to GTK+.
   virtual gboolean OnNativeViewFocusEvent(GtkWidget* widget,
                                           GtkDirectionType type,
                                           gboolean* return_value) = 0;
 
   // Complete hack because I have no idea where else to put this platform
   // specific crud.
-  virtual void ShowContextMenu(const ContextMenuParams& params) = 0;
+  virtual void ShowContextMenu(const content::ContextMenuParams& params) = 0;
 
   virtual ~TabContentsViewWrapperGtk() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_WRAPPER_GTK_H_