Parse "purpose" member from Web Manifest

content/renderer/manifest/manifest_parser.h

Index: content/renderer/manifest/manifest_parser.h
diff --git a/content/renderer/manifest/manifest_parser.h b/content/renderer/manifest/manifest_parser.h
index 935593026fd159e69b7777072c139915d3ee6107..409fe946ee3a9cd5897da5ae8c9acc4375375dd6 100644
--- a/content/renderer/manifest/manifest_parser.h
+++ b/content/renderer/manifest/manifest_parser.h
@@ -131,6 +131,15 @@ class CONTENT_EXPORT ManifestParser {
   // 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 of

[pkotwicz, 2016/10/18 14:13:56]

Nit: "or of type" -> "or not of type"

[F, 2016/10/18 15:34:46]

Done.

+  // type "string", or a vector containing Manifest::Icon::IconPurpose::Any for

[pkotwicz, 2016/10/18 14:13:56]

Nit: "or a vector" -> "and a vector"

[F, 2016/10/18 15:34:46]

Done.

+  // all other parsing exceptions.
+  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