Add getDefaultFontSize and setDefaultFontSize to Font Settings Extension API.

chrome/browser/extensions/extension_font_settings_api.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_FONT_SETTINGS_API_H__
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FONT_SETTINGS_API_H__
 #pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 
@@ skipping 12 matching lines @@
 class GetFontListFunction : public AsyncExtensionFunction {
  public:
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.fontSettings.getFontList")
 
  private:
   void FontListHasLoaded(scoped_ptr<base::ListValue> list);
   bool CopyFontsToResult(base::ListValue* fonts);
 };
 
+class GetDefaultFontSizeFunction : public SyncExtensionFunction {
+ public:
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME(
+      "experimental.fontSettings.getDefaultFontSize")
+};
+
+class SetDefaultFontSizeFunction : public SyncExtensionFunction {
+ public:
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME(
+      "experimental.fontSettings.setDefaultFontSize")
+};
+
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FONT_SETTINGS_API_H__