[Fetch API] Implement Request.formData and Response.formData.

third_party/WebKit/Source/modules/fetch/BytesConsumerTestUtil.h

Index: third_party/WebKit/Source/modules/fetch/BytesConsumerTestUtil.h
diff --git a/third_party/WebKit/Source/modules/fetch/BytesConsumerTestUtil.h b/third_party/WebKit/Source/modules/fetch/BytesConsumerTestUtil.h
index f858b783f26962bed510d4a4f2e6520c5ed08254..e635556b23707c052ff458b6c5322d2ea3f890d1 100644
--- a/third_party/WebKit/Source/modules/fetch/BytesConsumerTestUtil.h
+++ b/third_party/WebKit/Source/modules/fetch/BytesConsumerTestUtil.h
@@ -59,6 +59,7 @@ class BytesConsumerTestUtil {
     MOCK_METHOD1(didFetchDataLoadedBlobHandleMock,
                  void(RefPtr<BlobDataHandle>));
     MOCK_METHOD1(didFetchDataLoadedArrayBufferMock, void(DOMArrayBuffer*));
+    MOCK_METHOD1(didFetchDataLoadedFormDataMock, void(FormData*));
     MOCK_METHOD1(didFetchDataLoadedString, void(const String&));
     MOCK_METHOD0(didFetchDataLoadStream, void());
     MOCK_METHOD0(didFetchDataLoadFailed, void());
@@ -71,6 +72,9 @@ class BytesConsumerTestUtil {
         PassRefPtr<BlobDataHandle> blobDataHandle) override {
       didFetchDataLoadedBlobHandleMock(blobDataHandle);
     }
+    void didFetchDataLoadedFormData(FormData* FormData) override {
+      didFetchDataLoadedFormDataMock(FormData);
+    }
   };
 
   class Command final {