Mojo C++ bindings: switch WebKit mojom targets to use STL/WTF types.

chrome/browser/budget_service/budget_database.cc

Index: chrome/browser/budget_service/budget_database.cc
diff --git a/chrome/browser/budget_service/budget_database.cc b/chrome/browser/budget_service/budget_database.cc
index d59bc1d15a63556644720ba5c896d5764067cfdd..41fd391029f87511b98273e8fc9b1f1a61154926 100644
--- a/chrome/browser/budget_service/budget_database.cc
+++ b/chrome/browser/budget_service/budget_database.cc
@@ -130,7 +130,7 @@ void BudgetDatabase::AddToCache(
 void BudgetDatabase::GetBudgetAfterSync(const url::Origin& origin,
                                         const GetBudgetCallback& callback,
                                         bool success) {
-  mojo::Array<blink::mojom::BudgetStatePtr> predictions;
+  std::vector<blink::mojom::BudgetStatePtr> predictions;
 
   // If the database wasn't able to read the information, return the
   // failure and an empty predictions array.