Context menus should appear above the touch point if invoked by long press.

content/browser/web_contents/web_contents_impl.cc

 // 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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 1400 matching lines @@
   RenderWidgetHost* widget_host = widget_host_view->GetRenderWidgetHost();
   if (!widget_host->GetProcess()->HasConnection()) {
     // The view has gone away or the renderer crashed. Nothing to do.
     return NULL;
   }
 
   return widget_host_view;
 }
 
 void WebContentsImpl::ShowContextMenu(
-    const content::ContextMenuParams& params) {
+    const content::ContextMenuParams& params,
+    const content::ContextMenuEventType& type) {
   // Allow WebContentsDelegates to handle the context menu operation first.
   if (delegate_ && delegate_->HandleContextMenu(params))
     return;
 
-  render_view_host_delegate_view_->ShowContextMenu(params);
+  render_view_host_delegate_view_->ShowContextMenu(params, type);
 }
 
 void WebContentsImpl::RequestMediaAccessPermission(
     const content::MediaStreamRequest* request,
     const content::MediaResponseCallback& callback) {
   if (delegate_)
     delegate_->RequestMediaAccessPermission(this, request, callback);
   else
     callback.Run(content::MediaStreamDevices());
 }
@@ skipping 1816 matching lines @@
       old_browser_plugin_host()->embedder_render_process_host();
   *embedder_container_id = old_browser_plugin_host()->instance_id();
   int embedder_process_id =
       embedder_render_process_host ? embedder_render_process_host->GetID() : -1;
   if (embedder_process_id != -1) {
     *embedder_channel_name =
         StringPrintf("%d.r%d", render_view_host->GetProcess()->GetID(),
                      embedder_process_id);
   }
 }