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

chrome/browser/tab_contents/chrome_web_contents_view_mac_delegate.mm

 // 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.
 
 #import "chrome/browser/tab_contents/chrome_web_contents_view_mac_delegate.h"
 
 #import "chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.h"
 #include "chrome/browser/tab_contents/render_view_context_menu_mac.h"
 #include "chrome/browser/tab_contents/web_drag_bookmark_handler_mac.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
@@ skipping 21 matching lines @@
     RenderWidgetHost* render_widget_host) {
   return [[ChromeRenderWidgetHostViewMacDelegate alloc]
       initWithRenderWidgetHost:render_widget_host];
 }
 
 content::WebDragDestDelegate* ChromeWebContentsViewMacDelegate::DragDelegate() {
   return static_cast<content::WebDragDestDelegate*>(bookmark_handler_.get());
 }
 
 void ChromeWebContentsViewMacDelegate::ShowContextMenu(
-    const ContextMenuParams& params) {
+    const content::ContextMenuParams& params) {
   // The renderer may send the "show context menu" message multiple times, one
   // for each right click mouse event it receives. Normally, this doesn't happen
   // because mouse events are not forwarded once the context menu is showing.
   // However, there's a race - the context menu may not yet be showing when
   // the second mouse event arrives. In this case, |ShowContextMenu()| will
   // get called multiple times - if so, don't create another context menu.
   // TODO(asvitkine): Fix the renderer so that it doesn't do this.
   RenderWidgetHostView* widget_view = web_contents_->GetRenderWidgetHostView();
   if (widget_view && widget_view->showing_context_menu())
     return;
 
   context_menu_.reset(
       new RenderViewContextMenuMac(web_contents_,
                                    params,
                                    web_contents_->GetContentNativeView()));
   context_menu_->Init();
 }
 
 void ChromeWebContentsViewMacDelegate::NativeViewCreated(NSView* view) {
   view_id_util::SetID(view, VIEW_ID_TAB_CONTAINER);
 }
 
 void ChromeWebContentsViewMacDelegate::NativeViewDestroyed(NSView* view) {
   view_id_util::UnsetID(view);
 }