Move Tuple to base namespace.

printing/pdf_render_settings.h

 // 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.
 
 #ifndef PRINTING_PDF_RENDER_SETTINGS_H_
 #define PRINTING_PDF_RENDER_SETTINGS_H_
 
 #include "base/tuple.h"
 #include "ipc/ipc_param_traits.h"
 #include "printing/printing_export.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace printing {
 
 // Defining PDF rendering settings here as a Tuple as following:
 // gfx::Rect - render area
 // int - render dpi
 // bool - autorotate pages to fit paper
-typedef Tuple<gfx::Rect, int, bool> PdfRenderSettingsBase;
+typedef base::Tuple<gfx::Rect, int, bool> PdfRenderSettingsBase;
 
 class PdfRenderSettings : public PdfRenderSettingsBase {
  public:
   PdfRenderSettings() : PdfRenderSettingsBase() {}
   PdfRenderSettings(gfx::Rect area, int dpi, bool autorotate)
       : PdfRenderSettingsBase(area, dpi, autorotate) {}
   ~PdfRenderSettings() {}
 
-  const gfx::Rect& area() const { return ::get<0>(*this); }
-  int dpi() const { return ::get<1>(*this); }
-  bool autorotate() const { return ::get<2>(*this); }
+  const gfx::Rect& area() const { return base::get<0>(*this); }
+  int dpi() const { return base::get<1>(*this); }
+  bool autorotate() const { return base::get<2>(*this); }
 };
 
 }  // namespace printing
 
 namespace IPC {
 template <>
 struct SimilarTypeTraits<printing::PdfRenderSettings> {
   typedef printing::PdfRenderSettingsBase Type;
 };
 
 }  // namespace IPC
 
 #endif  // PRINTING_PDF_RENDER_SETTINGS_H_