Remove support for the web manifest icon density member.

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 108 matching lines @@
   // Parses the 'src' field of an icon, as defined in:
   // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-src-member-of-an-icon
   // Returns the parsed GURL if any, an empty GURL if the parsing failed.
   GURL ParseIconSrc(const base::DictionaryValue& icon);
 
   // Parses the 'type' field of an icon, as defined in:
   // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-type-member-of-an-icon
   // Returns the parsed string if any, a null string if the parsing failed.
   base::NullableString16 ParseIconType(const base::DictionaryValue& icon);
 
-  // Parses the 'density' field of an icon, as defined in:
-  // http://w3c.github.io/manifest/#dfn-steps-for-processing-a-density-member-of-an-icon
-  // Returns the parsed double if any, Manifest::Icon::kDefaultDensity if the
-  // parsing failed.
-  double ParseIconDensity(const base::DictionaryValue& icon);
-
   // Parses the 'sizes' field of an icon, as defined in:
   // http://w3c.github.io/manifest/#dfn-steps-for-processing-a-sizes-member-of-an-icon
   // 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 'icons' field of a Manifest, as defined in:
   // http://w3c.github.io/manifest/#dfn-steps-for-processing-the-icons-member
   // Returns a vector of Manifest::Icon with the successfully parsed icons, if
@@ skipping 61 matching lines @@
   bool failed_;
   Manifest manifest_;
   std::vector<std::unique_ptr<ErrorInfo>> errors_;
 
   DISALLOW_COPY_AND_ASSIGN(ManifestParser);
 };
 
 } // namespace content
 
 #endif  // CONTENT_RENDERER_MANIFEST_MANIFEST_PARSER_H_