[Extensions] Break up BaseFeatureProvider, create JSONFeatureProvider

extensions/common/features/json_feature_provider.cc

Index: extensions/common/features/json_feature_provider.cc
diff --git a/extensions/common/features/base_feature_provider.cc b/extensions/common/features/json_feature_provider.cc
similarity index 72%
copy from extensions/common/features/base_feature_provider.cc
copy to extensions/common/features/json_feature_provider.cc
index 40065ff01fece213028bf1cc832ba13efb9bc8b4..15eba689bc76c4d23d63a59d8c8ffe08d19968e5 100644
--- a/extensions/common/features/base_feature_provider.cc
+++ b/extensions/common/features/json_feature_provider.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/common/features/base_feature_provider.h"
+#include "extensions/common/features/json_feature_provider.h"
 
 #include <stddef.h>
 
@@ -43,7 +43,7 @@ bool ParseFeature(const base::DictionaryValue* value,
 
 }  // namespace
 
-BaseFeatureProvider::BaseFeatureProvider(const base::DictionaryValue& root,
+JSONFeatureProvider::JSONFeatureProvider(const base::DictionaryValue& root,
                                          FeatureFactory factory)
     : factory_(factory) {
   for (base::DictionaryValue::Iterator iter(root); !iter.IsAtEnd();
@@ -62,7 +62,7 @@ BaseFeatureProvider::BaseFeatureProvider(const base::DictionaryValue& root,
       // If one of the features has "noparent" set, stop pushing features on
       // the stack. The features will then be parsed in order, starting with
       // the farthest parent that is either top level or has "noparent" set.
-      std::stack<std::pair<std::string, const base::DictionaryValue*> >
+      std::stack<std::pair<std::string, const base::DictionaryValue*>>
           parse_stack;
       while (!split.empty()) {
         std::string parent_name = base::JoinString(split, ".");
@@ -80,7 +80,8 @@ BaseFeatureProvider::BaseFeatureProvider(const base::DictionaryValue& root,
                 break;
               parent = nullptr;
             }
-            CHECK(parent) << parent_name << " must declare one of its features"
+            CHECK(parent)
+                << parent_name << " must declare one of its features"
                 << " the default parent, with {\"default_parent\": true}.";
           }
           parse_stack.push(std::make_pair(parent_name, parent));
@@ -95,8 +96,7 @@ BaseFeatureProvider::BaseFeatureProvider(const base::DictionaryValue& root,
       // Parse all parent features.
       bool parse_error = false;
       while (!parse_stack.empty()) {
-        if (!ParseFeature(parse_stack.top().second,
-                          parse_stack.top().first,
+        if (!ParseFeature(parse_stack.top().second, parse_stack.top().first,
                           feature.get())) {
           parse_error = true;
           break;
@@ -144,53 +144,6 @@ BaseFeatureProvider::BaseFeatureProvider(const base::DictionaryValue& root,
   }
 }
 
-BaseFeatureProvider::~BaseFeatureProvider() {
-}
-
-const FeatureMap& BaseFeatureProvider::GetAllFeatures() const {
-  return features_;
-}
-
-Feature* BaseFeatureProvider::GetFeature(const std::string& name) const {
-  FeatureMap::const_iterator iter = features_.find(name);
-  if (iter != features_.end())
-    return iter->second.get();
-  else
-    return nullptr;
-}
-
-Feature* BaseFeatureProvider::GetParent(Feature* feature) const {
-  CHECK(feature);
-  if (feature->no_parent())
-    return nullptr;
-
-  std::vector<std::string> split = base::SplitString(
-      feature->name(), ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
-  if (split.size() < 2)
-    return nullptr;
-  split.pop_back();
-  return GetFeature(base::JoinString(split, "."));
-}
-
-// Children of a given API are named starting with parent.name()+".", which
-// means they'll be contiguous in the features_ std::map.
-std::vector<Feature*> BaseFeatureProvider::GetChildren(const Feature& parent)
-    const {
-  std::string prefix = parent.name() + ".";
-  const FeatureMap::const_iterator first_child = features_.lower_bound(prefix);
-
-  // All children have names before (parent.name() + ('.'+1)).
-  ++prefix.back();
-  const FeatureMap::const_iterator after_children =
-      features_.lower_bound(prefix);
-
-  std::vector<Feature*> result;
-  result.reserve(std::distance(first_child, after_children));
-  for (FeatureMap::const_iterator it = first_child; it != after_children;
-       ++it) {
-    result.push_back(it->second.get());
-  }
-  return result;
-}
+JSONFeatureProvider::~JSONFeatureProvider() {}
 
 }  // namespace extensions