[WIP] bindings: Introduce PropertyBag

Source/modules/serviceworkers/RequestInit.cpp

Index: Source/modules/serviceworkers/RequestInit.cpp
diff --git a/Source/modules/serviceworkers/RequestInit.cpp b/Source/modules/serviceworkers/RequestInit.cpp
index 5a23a6e3773fb61e2356be4f3a99415701f963c2..1ec20e2b01d99b666a565a40681bc5ec0b0a4db0 100644
--- a/Source/modules/serviceworkers/RequestInit.cpp
+++ b/Source/modules/serviceworkers/RequestInit.cpp
@@ -5,12 +5,12 @@
 #include "config.h"
 #include "RequestInit.h"
 
-#include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8Blob.h"
 #include "bindings/core/v8/V8FormData.h"
 #include "bindings/core/v8/custom/V8ArrayBufferCustom.h"
 #include "bindings/core/v8/custom/V8ArrayBufferViewCustom.h"
+#include "bindings/modules/v8/DictionaryForModules.h"
 #include "core/fileapi/Blob.h"
 #include "modules/serviceworkers/Headers.h"
 #include "platform/blob/BlobData.h"
@@ -21,16 +21,16 @@ namespace blink {
 
 RequestInit::RequestInit(ExecutionContext* context, const Dictionary& options, ExceptionState& exceptionState)
 {
-    DictionaryHelper::get(options, "method", method);
-    DictionaryHelper::get(options, "headers", headers);
+    options.get("method", method);
+    options.get("headers", headers);
     if (!headers) {
-        DictionaryHelper::get(options, "headers", headersDictionary);
+        options.get("headers", headersDictionary);
     }
-    DictionaryHelper::get(options, "mode", mode);
-    DictionaryHelper::get(options, "credentials", credentials);
+    options.get("mode", mode);
+    options.get("credentials", credentials);
 
     v8::Local<v8::Value> body;
-    if (!DictionaryHelper::get(options, "body", body) || body->IsUndefined() || body->IsNull())
+    if (!options.get("body", body) || body->IsUndefined() || body->IsNull())
         return;
     OwnPtr<BlobData> blobData = BlobData::create();
     v8::Isolate* isolate = toIsolate(context);