bindings: Use BooleanValue(v8::Context) in V8ErrorHandler

Source/bindings/core/v8/V8ErrorHandler.cpp

Index: Source/bindings/core/v8/V8ErrorHandler.cpp
diff --git a/Source/bindings/core/v8/V8ErrorHandler.cpp b/Source/bindings/core/v8/V8ErrorHandler.cpp
index f482e4873c3fb080343ade5d5e2d20a8d79eec7a..87d7bdefb4250e1a5e53d4115a8a93fcb407635b 100644
--- a/Source/bindings/core/v8/V8ErrorHandler.cpp
+++ b/Source/bindings/core/v8/V8ErrorHandler.cpp
@@ -89,7 +89,7 @@ void V8ErrorHandler::storeExceptionOnErrorEventWrapper(v8::Isolate* isolate, Err
 
 bool V8ErrorHandler::shouldPreventDefault(v8::Local<v8::Value> returnValue)
 {
-    return returnValue->IsBoolean() && returnValue->BooleanValue();
+    return returnValue->IsBoolean() && returnValue->BooleanValue(isolate()->GetCurrentContext()).FromJust();

[bashi, 2015/03/06 07:16:18]

Correct me if I'm wrong: I assume that BooleanValue is never |Nothing| when
IsBoolean() is true.

[dcarney, 2015/03/06 07:32:26]

If you know the object's type exactly, always use As or Cast instead.

 }
 
 } // namespace blink