Implement "scope" Web Manifest parsing

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 <stdint.h>
 
 #include <memory>
@@ skipping 72 matching lines @@
   // 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.
   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
   // Returns the parsed string if any, a null string if the parsing failed.
   base::NullableString16 ParseShortName(
       const base::DictionaryValue& dictionary);
 
+  // Parses the 'scope' field of the manifest, as defined in:
+  // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-scope-member
+  // Returns the parsed GURL if any, an empty GURL if the parsing failed.
+  GURL ParseScope(const base::DictionaryValue& dictionary,
+                  const GURL& start_url);
+
   // Parses the 'start_url' field of the manifest, as defined in:
   // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-start_url-member
   // Returns the parsed GURL if any, an empty GURL if the parsing failed.
   GURL ParseStartURL(const base::DictionaryValue& dictionary);
 
   // Parses the 'display' field of the manifest, as defined in:
   // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-display-member
   // Returns the parsed DisplayMode if any, WebDisplayModeUndefined if the
   // parsing failed.
   blink::WebDisplayMode ParseDisplay(const base::DictionaryValue& dictionary);
@@ skipping 90 matching lines @@
   bool failed_;
   Manifest manifest_;
   std::vector<ManifestDebugInfo::Error> errors_;
 
   DISALLOW_COPY_AND_ASSIGN(ManifestParser);
 };
 
 } // namespace content
 
 #endif  // CONTENT_RENDERER_MANIFEST_MANIFEST_PARSER_H_