Remove const qualifiers from Drive/GData files to avoid compile errors on Mac buildbots

chrome/browser/chromeos/gdata/drive_api_parser.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_CHROMEOS_GDATA_DRIVE_API_PARSER_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_API_PARSER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 79 matching lines @@
   static void RegisterJSONConverter(
       base::JSONValueConverter<DriveAppIcon>* converter);
 
   // Creates drive app icon instance from parsed JSON.
   static scoped_ptr<DriveAppIcon> CreateFrom(const base::Value& value);
 
   // Category of the icon.
   IconCategory category() const { return category_; }
 
   // Size in pixels of one side of the icon (icons are always square).
-  const int icon_side_length() const { return icon_side_length_; }
+  int icon_side_length() const { return icon_side_length_; }
 
   // Returns URL for this icon.
   const GURL& icon_url() const { return icon_url_; }
 
  private:
   // Parses and initializes data members from content of |value|.
   // Return false if parsing fails.
   bool Parse(const base::Value& value);
 
   // Extracts the icon category from the given string. Returns false and does
@@ skipping 472 matching lines @@
   GURL next_link_;
   int64 largest_change_id_;
   ScopedVector<ChangeResource> items_;
 
   DISALLOW_COPY_AND_ASSIGN(ChangeList);
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_API_PARSER_H_