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

chrome/browser/tab_contents/render_view_context_menu_mac.mm

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/tab_contents/render_view_context_menu_mac.h"
 
 #include "base/compiler_specific.h"
 #import "base/mac/scoped_sending_event.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/message_loop.h"
@@ skipping 32 matching lines @@
   return nil;
 }
 
 }  // namespace
 
 // Obj-C bridge class that is the target of all items in the context menu.
 // Relies on the tag being set to the command id.
 
 RenderViewContextMenuMac::RenderViewContextMenuMac(
     WebContents* web_contents,
-    const ContextMenuParams& params,
+    const content::ContextMenuParams& params,
     NSView* parent_view)
     : RenderViewContextMenu(web_contents, params),
       parent_view_(parent_view) {
 }
 
 RenderViewContextMenuMac::~RenderViewContextMenuMac() {
 }
 
 void RenderViewContextMenuMac::PlatformInit() {
   InitPlatformMenu();
@@ skipping 87 matching lines @@
                                      command_id);
   if (!item)
     return;
 
   // Update the returned NSMenuItem directly so we can update it immediately.
   [item setEnabled:enabled];
   [item setTitle:SysUTF16ToNSString(title)];
   [item setHidden:hidden];
   [[item menu] itemChanged:item];
 }