Correct the comment for ParseIconPurpose in manifest_parser.h

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 116 matching lines @@
   // Parses the 'sizes' field of an icon, as defined in:
   // https://w3c.github.io/manifest/#dfn-steps-for-processing-a-sizes-member-of-an-image
   // Returns a vector of gfx::Size with the successfully parsed sizes, if any.
   // An empty vector if the field was not present or empty. "Any" is represented
   // by gfx::Size(0, 0).
   std::vector<gfx::Size> ParseIconSizes(const base::DictionaryValue& icon);
 
   // Parses the 'purpose' field of an icon, as defined in:
   // https://w3c.github.io/manifest/#dfn-steps-for-processing-a-purpose-member-of-an-image
   // Returns a vector of Manifest::Icon::IconPurpose with the successfully
-  // parsed icon purposes, an empty vector if the field was not present or not
-  // of type "string", and a vector containing Manifest::Icon::IconPurpose::Any
-  // for all other parsing exceptions.
+  // parsed icon purposes, and a vector with Manifest::Icon::IconPurpose::Any if
+  // the parsing failed.
   std::vector<Manifest::Icon::IconPurpose> ParseIconPurpose(
       const base::DictionaryValue& icon);
 
   // Parses the 'icons' field of a Manifest, as defined in:
   // https://w3c.github.io/manifest/#dfn-steps-for-processing-an-array-of-images
   // Returns a vector of Manifest::Icon with the successfully parsed icons, if
   // any. An empty vector if the field was not present or empty.
   std::vector<Manifest::Icon> ParseIcons(
       const base::DictionaryValue& dictionary);
 
@@ skipping 58 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_