We do not pass enums by conts references. This CL fixes style errors introduced

content/shell/shell_web_contents_view_delegate_gtk.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/shell/shell_web_contents_view_delegate.h"
 
 #include "content/public/browser/devtools_http_handler.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ skipping 24 matching lines @@
     : web_contents_(web_contents),
       floating_(gtk_floating_container_new()) {
 }
 
 ShellWebContentsViewDelegate::~ShellWebContentsViewDelegate() {
   floating_.Destroy();
 }
 
 void ShellWebContentsViewDelegate::ShowContextMenu(
     const ContextMenuParams& params,
-    const ContextMenuSourceType& type) {
+    ContextMenuSourceType type) {
   GtkWidget* menu = gtk_menu_new();
 
   params_ = params;
   bool has_link = !params_.unfiltered_link_url.is_empty();
   bool has_selection = !params_.selection_text.empty();
 
   if (params_.media_type == WebContextMenuData::MediaTypeNone &&
       !has_link &&
       !has_selection &&
       !params_.is_editable) {
@@ skipping 185 matching lines @@
   GURL url = delegate->devtools_http_handler()->GetFrontendURL(
       web_contents_->GetRenderViewHost());
   Shell::CreateNewWindow(web_contents_->GetBrowserContext(),
                          url,
                          NULL,
                          MSG_ROUTING_NONE,
                          NULL);
 }
 
 }  // namespace content