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

content/browser/tab_contents/web_contents_view_mac.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 <Carbon/Carbon.h>
 
 #import "content/browser/tab_contents/web_contents_view_mac.h"
 
 #include <string>
 
@@ skipping 326 matching lines @@
                                                   gfx::Rect());
 
   // A RenderWidgetHostViewMac has lifetime scoped to the view. Now that it's
   // properly embedded (or purposely ignored) we can release the retain we took
   // in CreateNewFullscreenWidgetInternal().
   RenderWidgetHostViewMac* widget_view_mac =
       static_cast<RenderWidgetHostViewMac*>(widget_host_view);
   [widget_view_mac->GetNativeView() release];
 }
 
-void WebContentsViewMac::ShowContextMenu(const ContextMenuParams& params) {
+void WebContentsViewMac::ShowContextMenu(
+    const content::ContextMenuParams& params) {
   // Allow delegates to handle the context menu operation first.
   if (tab_contents_->GetDelegate() &&
       tab_contents_->GetDelegate()->HandleContextMenu(params)) {
     return;
   }
 
   if (delegate())
     delegate()->ShowContextMenu(params);
   else
     DLOG(ERROR) << "Cannot show context menus without a delegate.";
@@ skipping 245 matching lines @@
       [[[notification userInfo] objectForKey:kSelectionDirection]
         unsignedIntegerValue];
   if (direction == NSDirectSelection)
     return;
 
   [self tabContents]->
       FocusThroughTabTraversal(direction == NSSelectingPrevious);
 }
 
 @end