Remove mutableResourceRequest() by FetchRequest::setRequestContext()

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

Index: third_party/WebKit/Source/web/tests/WebFrameTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
index a2fd5bc6e1f81b9c860c8f5171e9396187ed86b3..73e5f039a1cfd7aa6b174ac1b8e0fe3726261e72 100644
--- a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
@@ -8254,8 +8254,7 @@ TEST_P(ParameterizedWebFrameTest, NotifyManifestChange) {
 static Resource* fetchManifest(Document* document, const KURL& url) {
   FetchRequest fetchRequest =
       FetchRequest(ResourceRequest(url), FetchInitiatorInfo());
-  fetchRequest.mutableResourceRequest().setRequestContext(
-      WebURLRequest::RequestContextManifest);
+  fetchRequest.setRequestContext(WebURLRequest::RequestContextManifest);
 
   return RawResource::fetchSynchronously(fetchRequest, document->fetcher());
 }