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

content/shell/shell_web_contents_view_delegate.h

 // 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.
 
 #ifndef CONTENT_SHELL_SHELL_WEB_CONTENTS_VIEW_DELEGATE_H_
 #define CONTENT_SHELL_SHELL_WEB_CONTENTS_VIEW_DELEGATE_H_
 
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view_delegate.h"
 #include "content/public/common/context_menu_params.h"
 #include "content/public/common/context_menu_source_type.h"
 
 #if defined(TOOLKIT_GTK)
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/gtk/owned_widget_gtk.h"
 #endif
 
 namespace content {
 
 class ShellWebContentsViewDelegate : public WebContentsViewDelegate {
  public:
   explicit ShellWebContentsViewDelegate(WebContents* web_contents);
   virtual ~ShellWebContentsViewDelegate();
 
   // Overridden from WebContentsViewDelegate:
   virtual void ShowContextMenu(const ContextMenuParams& params,
-                               const ContextMenuSourceType& type) OVERRIDE;
+                               ContextMenuSourceType type) OVERRIDE;
   virtual WebDragDestDelegate* GetDragDestDelegate() OVERRIDE;
 
 #if defined(TOOLKIT_GTK)
   virtual void Initialize(GtkWidget* expanded_container,
                           ui::FocusStoreGtk* focus_store) OVERRIDE;
   virtual gfx::NativeView GetNativeView() const OVERRIDE;
   virtual void Focus() OVERRIDE;
   virtual gboolean OnNativeViewFocusEvent(GtkWidget* widget,
                                           GtkDirectionType type,
                                           gboolean* return_value) OVERRIDE;
@@ skipping 38 matching lines @@
   CHROMEGTK_CALLBACK_0(ShellWebContentsViewDelegate, void,
                        OnInspectMenuActivated);
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ShellWebContentsViewDelegate);
 };
 
 }  // namespace content
 
 #endif // CONTENT_SHELL_SHELL_WEB_CONTENTS_VIEW_DELEGATE_H_