Plumb reserve method of the BudgetAPI

third_party/WebKit/Source/modules/budget/BudgetService.idl

Index: third_party/WebKit/Source/modules/budget/BudgetService.idl
diff --git a/third_party/WebKit/Source/modules/budget/BudgetService.idl b/third_party/WebKit/Source/modules/budget/BudgetService.idl
index ce186a719ea2cc9919b9b0af0849c31eac3f2258..4fa8f3ffe2ce15960637d4e2ef35662df9674a3e 100644
--- a/third_party/WebKit/Source/modules/budget/BudgetService.idl
+++ b/third_party/WebKit/Source/modules/budget/BudgetService.idl
@@ -5,13 +5,14 @@
 // https://beverloo.github.io/budget-api/#budget-service-interface
 // TODO(harkness): Link WICG spec when it exists.
 
-enum ActionType {
+enum OperationType {
     "silent-push"
 };
 
 [
     RuntimeEnabled=Budget
 ] interface BudgetService {
-    [CallWith=ScriptState] Promise<double> getCost(ActionType actionType);
+    [CallWith=ScriptState] Promise<double> getCost(OperationType operation);
     [CallWith=ScriptState] Promise<FrozenArray<BudgetState>> getBudget();
+    [CallWith=ScriptState] Promise<boolean> reserve(OperationType operation);
 };