Revert 190836 "Implement API features for the Extension API feat..."

trunk/src/chrome/common/extensions/features/manifest_feature.cc

Index: trunk/src/chrome/common/extensions/features/manifest_feature.cc
===================================================================
--- trunk/src/chrome/common/extensions/features/manifest_feature.cc	(revision 190861)
+++ trunk/src/chrome/common/extensions/features/manifest_feature.cc	(working copy)
@@ -34,20 +34,4 @@
   return CreateAvailability(IS_AVAILABLE);
 }
 
-std::string ManifestFeature::Parse(const DictionaryValue* value) {
-  std::string error = SimpleFeature::Parse(value);
-  if (!error.empty())
-    return error;
-
-  if (extension_types()->empty()) {
-    return name() + ": Manifest features must specify at least one " +
-        "value for extension_types.";
-  }
-
-  if (!GetContexts()->empty())
-    return name() + ": Manifest features do not support contexts.";
-
-  return "";
-}
-
 }  // namespace