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

webkit/tools/test_shell/test_webview_delegate.h

Index: webkit/tools/test_shell/test_webview_delegate.h
===================================================================
--- webkit/tools/test_shell/test_webview_delegate.h	(revision 121660)
+++ webkit/tools/test_shell/test_webview_delegate.h	(working copy)
@@ -131,8 +131,6 @@
       const WebKit::WebString& default_value, WebKit::WebString* actual_value);
   virtual bool runModalBeforeUnloadDialog(
       WebKit::WebFrame* frame, const WebKit::WebString& message);
-  virtual void showContextMenu(
-      WebKit::WebFrame* frame, const WebKit::WebContextMenuData& data);
   virtual void setStatusText(const WebKit::WebString& text);
   virtual void startDragging(
       const WebKit::WebDragData& data, WebKit::WebDragOperationsMask mask,
@@ -265,12 +263,6 @@
 #if defined(OS_WIN)
   IDropTarget* drop_delegate() { return drop_delegate_.get(); }
 #endif
-  const CapturedContextMenuEvents& captured_context_menu_events() const {
-    return captured_context_menu_events_;
-  }
-  void clear_captured_context_menu_events() {
-    captured_context_menu_events_.clear();
-  }
 
   void set_pending_extra_data(TestShellExtraData* extra_data) {
     pending_extra_data_.reset(extra_data);
@@ -403,7 +395,6 @@
   ResourceMap resource_identifier_map_;
   std::string GetResourceDescription(uint32 identifier);
 
-  CapturedContextMenuEvents captured_context_menu_events_;
   scoped_ptr<WebKit::WebContextMenuData> last_context_menu_data_;
 
   WebCursor current_cursor_;