DCHECK in BudgetService getCost and reserve if an invalid type is supplied.

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

Index: third_party/WebKit/Source/modules/budget/BudgetService.cpp
diff --git a/third_party/WebKit/Source/modules/budget/BudgetService.cpp b/third_party/WebKit/Source/modules/budget/BudgetService.cpp
index afd12a2d84c8dd630330755a589e226a619cf4bb..fda4afeb808c3e7fec53a2feb04ebe383390f57d 100644
--- a/third_party/WebKit/Source/modules/budget/BudgetService.cpp
+++ b/third_party/WebKit/Source/modules/budget/BudgetService.cpp
@@ -65,10 +65,7 @@ ScriptPromise BudgetService::getCost(ScriptState* scriptState,
         scriptState, DOMException::create(SecurityError, errorMessage));
 
   mojom::blink::BudgetOperationType type = stringToOperationType(operation);
-  if (type == mojom::blink::BudgetOperationType::INVALID_OPERATION)
-    return ScriptPromise::rejectWithDOMException(
-        scriptState, DOMException::create(NotSupportedError,
-                                          "Invalid operation type specified"));
+  DCHECK_NE(type, mojom::blink::BudgetOperationType::INVALID_OPERATION);
 
   ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
   ScriptPromise promise = resolver->promise();
@@ -129,10 +126,7 @@ ScriptPromise BudgetService::reserve(ScriptState* scriptState,
   DCHECK(m_service);
 
   mojom::blink::BudgetOperationType type = stringToOperationType(operation);
-  if (type == mojom::blink::BudgetOperationType::INVALID_OPERATION)
-    return ScriptPromise::rejectWithDOMException(
-        scriptState, DOMException::create(NotSupportedError,
-                                          "Invalid operation type specified"));
+  DCHECK_NE(type, mojom::blink::BudgetOperationType::INVALID_OPERATION);
 
   String errorMessage;
   if (!scriptState->getExecutionContext()->isSecureContext(errorMessage))