Allow API functions and events to have entries in _api_features.json

chrome/common/extensions/api/extension_api.h

Index: chrome/common/extensions/api/extension_api.h
diff --git a/chrome/common/extensions/api/extension_api.h b/chrome/common/extensions/api/extension_api.h
index 943217dca568967b372b466aedea28874a12d858..b1aa0cb14a8add24e204e7446f430fd13906d20e 100644
--- a/chrome/common/extensions/api/extension_api.h
+++ b/chrome/common/extensions/api/extension_api.h
@@ -76,6 +76,12 @@ class ExtensionAPI {
                                     Feature::Context context,
                                     const GURL& url);
 
+  // Determines whether an API, or any parts of that API, are available in
+  // |context|.
+  bool IsAnyFeatureAvailableToContext(const std::string& api_name,
+                                      Feature::Context context,
+                                      const GURL& url);
+
   // Returns true if |name| is a privileged API path. Privileged paths can only
   // be called from extension code which is running in its own designated
   // extension process. They cannot be called from extension code running in