Rename FormData/FormDataBuilder to EncodedFormData/FormDataEncoder respectively.

Source/modules/fetch/FetchBlobDataConsumerHandle.cpp

Index: Source/modules/fetch/FetchBlobDataConsumerHandle.cpp
diff --git a/Source/modules/fetch/FetchBlobDataConsumerHandle.cpp b/Source/modules/fetch/FetchBlobDataConsumerHandle.cpp
index 6c9d35254a218c97523a50a96b6f319eeb5a5835..718dfd9b56f907d4e626462acee454cfa6d4dca2 100644
--- a/Source/modules/fetch/FetchBlobDataConsumerHandle.cpp
+++ b/Source/modules/fetch/FetchBlobDataConsumerHandle.cpp
@@ -225,12 +225,12 @@ public:
             return blobDataHandle.release();
         }
 
-        PassRefPtr<FormData> drainAsFormData() override
+        PassRefPtr<EncodedFormData> drainAsFormData() override
         {
             RefPtr<BlobDataHandle> handle = drainAsBlobDataHandle(AllowBlobWithInvalidSize);
             if (!handle)
                 return nullptr;
-            RefPtr<FormData> formData = FormData::create();
+            RefPtr<EncodedFormData> formData = EncodedFormData::create();
             formData->appendBlob(handle->uuid(), handle);
             return formData.release();
         }