Plumb reserve method of the BudgetAPI

third_party/WebKit/LayoutTests/http/tests/budget/get-budget.html

Index: third_party/WebKit/LayoutTests/http/tests/budget/get-budget.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/budget/get-budget.html b/third_party/WebKit/LayoutTests/http/tests/budget/get-budget.html
index 92839ea2bd93c71e684a6b61337407037f59b58e..1b1758c4a379ab1c3eba73424f87c336d9122d5b 100644
--- a/third_party/WebKit/LayoutTests/http/tests/budget/get-budget.html
+++ b/third_party/WebKit/LayoutTests/http/tests/budget/get-budget.html
@@ -15,6 +15,7 @@
       promise_test(function() {
         return budgetServiceMock.then(mock => {
           assert_own_property(Navigator.prototype, 'budget');
+          mock.addBudget(TEST_BUDGET_TIME, TEST_BUDGET_AT);
           return navigator.budget.getBudget();
         }).then(budget => {
           assert_equals(budget.length, 1);
@@ -22,6 +23,19 @@
           assert_equals(budget[0].time, TEST_BUDGET_TIME);
         });
       }, 'BudgetService.GetBudget should return correct results.');
+
+      promise_test(function() {
+        return budgetServiceMock.then(mock => {
+          assert_own_property(Navigator.prototype, 'budget');
+          mock.setError("database-error");
+          return navigator.budget.getBudget();
+        }).then(budget => {
+          assert_unreached('getBudget should have failed.');
+        }, function(error) {
+          assert_equals(error.name, 'DataError');
+          assert_equals(error.message, "Error reading the budget database.");
+        });
+      }, 'BudgetService.GetBudget should return correct results.');
     </script>
   </body>
 </html>