[Extensions] Use compiled feature files

extensions/common/extensions_client.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_
 #define EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 39 matching lines @@
   virtual const PermissionMessageProvider& GetPermissionMessageProvider()
       const = 0;
 
   // Returns the application name. For example, "Chromium" or "app_shell".
   virtual const std::string GetProductName() = 0;
 
   // Create a FeatureProvider for a specific feature type, e.g. "permission".
   virtual std::unique_ptr<FeatureProvider> CreateFeatureProvider(
       const std::string& name) const = 0;
 
-  // Create a JSONFeatureProviderSource for a specific feature type,
-  // e.g. "permission". Currently, all features are loaded from
-  // JSONFeatureProviderSources.
-  // This is used primarily in CreateFeatureProvider, above.
-  virtual std::unique_ptr<JSONFeatureProviderSource>
-  CreateFeatureProviderSource(const std::string& name) const = 0;
+  // Returns the dictionary of the API features json file.
+  // TODO(devlin): We should find a way to remove this.
+  virtual std::unique_ptr<JSONFeatureProviderSource> CreateAPIFeatureSource()
+      const = 0;
 
   // Takes the list of all hosts and filters out those with special
   // permission strings. Adds the regular hosts to |new_hosts|,
   // and adds any additional permissions to |permissions|.
   // TODO(sashab): Split this function in two: One to filter out ignored host
   // permissions, and one to get permissions for the given hosts.
   virtual void FilterHostPermissions(const URLPatternSet& hosts,
                                      URLPatternSet* new_hosts,
                                      PermissionIDSet* permissions) const = 0;
 
@@ skipping 65 matching lines @@
   // Return the extensions client.
   static ExtensionsClient* Get();
 
   // Initialize the extensions system with this extensions client.
   static void Set(ExtensionsClient* client);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_