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

content/browser/tab_contents/tab_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_TAB_CONTENTS_TAB_CONTENTS_VIEW_GTK_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 72 matching lines @@
   virtual void CreateNewWidget(int route_id,
                                WebKit::WebPopupType popup_type) OVERRIDE;
   virtual void CreateNewFullscreenWidget(int route_id) OVERRIDE;
   virtual void ShowCreatedWindow(int route_id,
                                  WindowOpenDisposition disposition,
                                  const gfx::Rect& initial_pos,
                                  bool user_gesture) OVERRIDE;
   virtual void ShowCreatedWidget(int route_id,
                                  const gfx::Rect& initial_pos) OVERRIDE;
   virtual void ShowCreatedFullscreenWidget(int route_id) OVERRIDE;
-  virtual void ShowContextMenu(const ContextMenuParams& params) OVERRIDE;
+  virtual void ShowContextMenu(
+      const content::ContextMenuParams& params) OVERRIDE;
   virtual void ShowPopupMenu(const gfx::Rect& bounds,
                              int item_height,
                              double item_font_size,
                              int selected_item,
                              const std::vector<WebMenuItem>& items,
                              bool right_aligned) OVERRIDE;
   virtual void StartDragging(const WebDropData& drop_data,
                              WebKit::WebDragOperationsMask allowed_ops,
                              const SkBitmap& image,
                              const gfx::Point& image_offset) OVERRIDE;
@@ skipping 53 matching lines @@
   // The overlaid view. Owned by the caller of |InstallOverlayView|; this is a
   // weak reference.
   GtkWidget* overlaid_view_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContentsViewGtk);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_GTK_H_