Move chrome zoom constants into their own file.

chrome/browser/chrome_page_zoom_constants.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 CHROME_BROWSER_CHROME_PAGE_ZOOM_H_
-#define CHROME_BROWSER_CHROME_PAGE_ZOOM_H_
+#ifndef CHROME_BROWSER_CHROME_PAGE_ZOOM_CONSTANTS_H_
+#define CHROME_BROWSER_CHROME_PAGE_ZOOM_CONSTANTS_H_
 #pragma once
 
-#include <vector>
+#include "base/basictypes.h"
 
 namespace chrome_page_zoom {
 
 // Zoom factors supported by the browser.
 extern const double kPresetZoomFactors[];
 
 // Size of |kPresetZoomFactors|.
 extern const size_t kPresetZoomFactorsSize;
 
-// Return a sorted vector of zoom factors. The vector will consist of preset
-// values along with a custom value (if the custom value is not already
-// represented.)
-std::vector<double> PresetZoomFactors(double custom_factor);
-
-// Return a sorted vector of zoom levels. The vector will consist of preset
-// values along with a custom value (if the custom value is not already
-// represented.)
-std::vector<double> PresetZoomLevels(double custom_level);
-
 }  // namespace chrome_page_zoom
 
-#endif  // CHROME_BROWSER_CHROME_PAGE_ZOOM_H_
+#endif  // CHROME_BROWSER_CHROME_PAGE_ZOOM_CONSTANTS_H_