bindings: Stop using the given creationContext in public APIs.

Source/web/WebArrayBufferConverter.cpp

Index: Source/web/WebArrayBufferConverter.cpp
diff --git a/Source/web/WebArrayBufferConverter.cpp b/Source/web/WebArrayBufferConverter.cpp
index c54f14c3bb23655a23466e6478ebcb17053af208..4044b7d70bf8dedcba07d137c2cb0461167e5d89 100644
--- a/Source/web/WebArrayBufferConverter.cpp
+++ b/Source/web/WebArrayBufferConverter.cpp
@@ -35,11 +35,13 @@
 
 namespace blink {
 
-v8::Local<v8::Value> WebArrayBufferConverter::toV8Value(WebArrayBuffer* buffer, v8::Local<v8::Object> creationContext, v8::Isolate* isolate)
+v8::Local<v8::Value> WebArrayBufferConverter::toV8Value(WebArrayBuffer* buffer, v8::Local<v8::Object> /* creationContext */, v8::Isolate* isolate)
 {
+    // We no longer use |creationContext| because it's often misused and points
+    // to a context faked by user script.
     if (!buffer)
         return v8::Local<v8::Value>();
-    return toV8(PassRefPtr<DOMArrayBuffer>(*buffer), creationContext, isolate);
+    return toV8(PassRefPtr<DOMArrayBuffer>(*buffer), isolate->GetCurrentContext()->Global(), isolate);
 }
 
 WebArrayBuffer* WebArrayBufferConverter::createFromV8Value(v8::Local<v8::Value> value, v8::Isolate* isolate)