Code cleanup: rename DisallowedExtensions to DisallowedFeature.

gpu/command_buffer/service/context_group.cc

Index: gpu/command_buffer/service/context_group.cc
===================================================================
--- gpu/command_buffer/service/context_group.cc	(revision 102160)
+++ gpu/command_buffer/service/context_group.cc	(working copy)
@@ -45,13 +45,13 @@
   *var = value;
 }
 
-bool ContextGroup::Initialize(const DisallowedExtensions& disallowed_extensions,
+bool ContextGroup::Initialize(const DisallowedFeatures& disallowed_features,
                               const char* allowed_features) {
   if (initialized_) {
     return true;
   }
 
-  if (!feature_info_.Initialize(disallowed_extensions, allowed_features)) {
+  if (!feature_info_.Initialize(disallowed_features, allowed_features)) {
     LOG(ERROR) << "ContextGroup::Initialize failed because FeatureInfo "
                << "initialization failed.";
     return false;