Remove support for the web manifest icon density member.

content/public/common/manifest.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_PUBLIC_COMMON_MANIFEST_H_
 #define CONTENT_PUBLIC_COMMON_MANIFEST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 22 matching lines @@
     // MUST be a valid url. If an icon doesn't have a valid URL, it will not be
     // successfully parsed, thus will not be represented in the Manifest.
     GURL src;
 
     // Null if the parsing failed or the field was not present. The type can be
     // any string and doesn't have to be a valid image MIME type at this point.
     // It is up to the consumer of the object to check if the type matches a
     // supported type.
     base::NullableString16 type;
 
-    // Default value is 1.0 if the value is missing or invalid.
-    double density;
-
     // Empty if the parsing failed, the field was not present or empty.
     // The special value "any" is represented by gfx::Size(0, 0).
     std::vector<gfx::Size> sizes;
-
-    // Default density. Set to 1.0.
-    static const double kDefaultDensity;
   };
 
   // Structure representing a related application.
   struct CONTENT_EXPORT RelatedApplication {
     RelatedApplication();
     ~RelatedApplication();
 
     // The platform on which the application can be found. This can be any
     // string, and is interpreted by the consumer of the object. Empty if the
     // parsing failed.
@@ skipping 73 matching lines @@
   static const size_t kMaxIPCStringLength;
 
   // Constant representing an invalid color. Set to a value outside the
   // range of a 32-bit integer.
   static const int64_t kInvalidOrMissingColor;
 };
 
 } // namespace content
 
 #endif // CONTENT_PUBLIC_COMMON_MANIFEST_H_