binding: Introduces ExceptionToPromiseScope.

third_party/WebKit/Source/bindings/modules/v8/custom/V8IDBObserverCustom.cpp

Index: third_party/WebKit/Source/bindings/modules/v8/custom/V8IDBObserverCustom.cpp
diff --git a/third_party/WebKit/Source/bindings/modules/v8/custom/V8IDBObserverCustom.cpp b/third_party/WebKit/Source/bindings/modules/v8/custom/V8IDBObserverCustom.cpp
index f5164a95a1cb8b8a9bc6c14b879d15db926d41cf..7eed4d0bf11781e55fca5e304da45e210f8dca1c 100644
--- a/third_party/WebKit/Source/bindings/modules/v8/custom/V8IDBObserverCustom.cpp
+++ b/third_party/WebKit/Source/bindings/modules/v8/custom/V8IDBObserverCustom.cpp
@@ -6,6 +6,7 @@
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/GeneratedCodeHelper.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8DOMWrapper.h"
 #include "bindings/modules/v8/V8IDBObserverCallback.h"
@@ -16,7 +17,7 @@ namespace blink {
 void V8IDBObserver::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
-        V8ThrowException::throwException(info.GetIsolate(), createMinimumArityTypeErrorForConstructor(info.GetIsolate(), "IDBObserver", 1, info.Length()));
+        throwMinimumArityErrorForConstructor(info.GetIsolate(), "IDBObserver", 1, info.Length());
         return;
     }