Implement ManifestParser in content/.

content/renderer/manifest/manifest_parser.h

+// Copyright 2014 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_RENDERER_MANIFEST_MANIFEST_PARSER_H_
+#define CONTENT_RENDERER_MANIFEST_MANIFEST_PARSER_H_
+
+#include <string>
+
+#include "base/strings/nullable_string16.h"
+#include "base/strings/string_piece.h"
+#include "content/common/content_export.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace content {
+
+struct Manifest;
+
+// ManifestParser handles the logic of parsing the Web Manifest from a string.
+// It implements:
+// http://w3c.github.io/manifest/#dfn-steps-for-processing-a-manifest
+// Its private methods implement all the sub steps required by the manifest
+// parsing algorithm.
+class CONTENT_EXPORT ManifestParser {
+ public:
+  static Manifest Parse(const base::StringPiece&);
+
+ private:
+  // Parses the 'name' field of the manifest, as defined in:
+  // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-name-member
+  // Returns the parsed string if any, a null string if the parsing failed.
+  static base::NullableString16 ParseName(
+      const base::DictionaryValue& dictionary);
+
+  // Parses the 'short_name' field of the manifest, as defined in:
+  // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-short-name-member
+  // |short_name| is an out parameter that must not be null.
+  // Returns the parsed string if any, a null string if the parsing failed.
+  static base::NullableString16 ParseShortName(
+      const base::DictionaryValue& dictionary);
+};
+
+} // namespace content
+
+#endif // CONTENT_RENDERER_MANIFEST_MANIFEST_PARSER_H_