Remove GetContexts() from the public interface of extensions::Feature. It was

extensions/common/extension_api_stub.cc

Index: extensions/common/extension_api_stub.cc
diff --git a/extensions/common/extension_api_stub.cc b/extensions/common/extension_api_stub.cc
index 465b1636964577e59a62fd54a5d982553bff29e4..da023344c2790b46cea8565998b369cbec49b3c4 100644
--- a/extensions/common/extension_api_stub.cc
+++ b/extensions/common/extension_api_stub.cc
@@ -36,7 +36,8 @@ bool ExtensionAPI::IsAnyFeatureAvailableToContext(const Feature& api,
   return false;
 }
 
-bool ExtensionAPI::IsPrivileged(const std::string& full_name) {
+bool ExtensionAPI::IsAvailableInUntrustedContext(const std::string& full_name,
+                                                 const Extension* extension) {
   return false;
 }