Implement FeatureProvider for ExtensionAPI.

chrome/common/extensions/manifest.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/common/extensions/manifest.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/string_split.h"
@@ skipping 20 matching lines @@
     scoped_ptr<Feature> feature =
         SimpleFeatureProvider::GetManifestFeatures()->GetFeature(*key);
     if (!feature.get()) {
       // When validating the extension manifests, we ignore keys that are not
       // recognized for forward compatibility.
       // TODO(aa): Consider having an error here in the case of strict error
       // checking to let developers know when they screw up.
       continue;
     }
 
-    Feature::Availability result = feature->IsAvailable(
+    Feature::Availability result = feature->IsAvailableToManifest(
         extension_id_, GetType(), Feature::ConvertLocation(location_),
         GetManifestVersion());
     if (result != Feature::IS_AVAILABLE) {
       *error = ExtensionErrorUtils::FormatErrorMessageUTF16(
           errors::kFeatureNotAllowed,
           *key,
           feature->GetErrorMessage(result));
       return false;
     }
   }
@@ skipping 96 matching lines @@
   base::SplitString(path, '.', &components);
   return CanAccessKey(components[0]);
 }
 
 bool Manifest::CanAccessKey(const std::string& key) const {
   scoped_ptr<Feature> feature =
       SimpleFeatureProvider::GetManifestFeatures()->GetFeature(key);
   if (!feature.get())
     return false;
 
-  return Feature::IS_AVAILABLE == feature->IsAvailable(
+  return Feature::IS_AVAILABLE == feature->IsAvailableToManifest(
       extension_id_, GetType(), Feature::ConvertLocation(location_),
       GetManifestVersion());
 }
 
 }  // namespace extensions