[Extensions Bindings] Handle updating context permissions

extensions/renderer/api_binding.h

Index: extensions/renderer/api_binding.h
diff --git a/extensions/renderer/api_binding.h b/extensions/renderer/api_binding.h
index 8e20a97e3a550c9143dcb2bd35af8e72c1181e68..292cdf318c95bcdc2522a4b7962bc3c25ace811e 100644
--- a/extensions/renderer/api_binding.h
+++ b/extensions/renderer/api_binding.h
@@ -47,9 +47,10 @@ class APIBinding {
       const std::string& property_name,
       const base::ListValue* property_values)>;
 
-  // The callback for determining if a given API method (specified by |name|)
-  // is available.
-  using AvailabilityCallback = base::Callback<bool(const std::string& name)>;
+  // The callback for determining if a given API feature (specified by |name|)
+  // is available in the given context.
+  using AvailabilityCallback =
+      base::Callback<bool(v8::Local<v8::Context>, const std::string& name)>;
 
   // The callback type for handling an API call.
   using HandlerCallback = base::Callback<void(gin::Arguments*)>;
@@ -63,6 +64,7 @@ class APIBinding {
              const base::ListValue* event_definitions,
              const base::DictionaryValue* property_definitions,
              const CreateCustomType& create_custom_type,
+             const AvailabilityCallback& is_available,
              std::unique_ptr<APIBindingHooks> binding_hooks,
              APITypeReferenceMap* type_refs,
              APIRequestHandler* request_handler,
@@ -70,9 +72,7 @@ class APIBinding {
   ~APIBinding();
 
   // Returns a new v8::Object for the API this APIBinding represents.
-  v8::Local<v8::Object> CreateInstance(
-      v8::Local<v8::Context> context,
-      const AvailabilityCallback& is_available);
+  v8::Local<v8::Object> CreateInstance(v8::Local<v8::Context> context);
 
   APIBindingHooks* hooks() { return binding_hooks_.get(); }
 
@@ -130,6 +130,9 @@ class APIBinding {
   // The callback for constructing a custom type.
   CreateCustomType create_custom_type_;
 
+  // The callback for checking availability of an API feature.
+  AvailabilityCallback is_available_;
+
   // The registered hooks for this API.
   std::unique_ptr<APIBindingHooks> binding_hooks_;