Push registration should read a "gcm_user_visible_only" key from the 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 6e5f8a9a988eb8994bac7946b7e9151337a14357..2087efba0744e0ee3cfefd27684e7307be5d8b6c 100644
--- a/content/renderer/manifest/manifest_parser.h
+++ b/content/renderer/manifest/manifest_parser.h
@@ -50,6 +50,13 @@ class CONTENT_EXPORT ManifestParser {
                                      const std::string& key,
                                      TrimType trim);
 
+  // Helper function to parse booleans present on a given |dictionary| in a
+  // given field identified by its |key|.
+  // Returns the parsed boolean if any, or |default_value| is parsing failed.

[mlamouri (slow - plz ping), 2014/12/01 21:05:09]

nit: s/is parsing failed/if parsing failed/.

[Peter Beverloo, 2014/12/03 15:01:59]

Done.

+  bool ParseBoolean(const base::DictionaryValue& dictionary,
+                    const std::string& key,
+                    bool default_value);
+
   // Helper function to parse URLs present on a given |dictionary| in a given
   // field identified by its |key|. The URL is first parsed as a string then
   // resolved using |base_url|.
@@ -123,6 +130,11 @@ class CONTENT_EXPORT ManifestParser {
   base::NullableString16 ParseGCMSenderID(
       const base::DictionaryValue& dictionary);
 
+  // Parses the 'gcm_user_visible_only' field of the manifest.
+  // This is a proprietary extension of the Web Manifest specification.
+  // Returns true iff the string could be parsed as the boolean true.
+  bool ParseGCMUserVisibleOnly(const base::DictionaryValue& dictionary);
+
   const base::StringPiece& data_;
   const GURL& manifest_url_;
   const GURL& document_url_;