Remove FetchRequest::mutableResourceRequest() where removing is trivial

third_party/WebKit/Source/platform/loader/fetch/ResourceFetcherTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 249 matching lines @@
 
  public:
   explicit RequestSameResourceOnComplete(Resource* resource)
       : m_resource(resource), m_notifyFinishedCalled(false) {}
 
   void notifyFinished(Resource* resource) override {
     EXPECT_EQ(m_resource, resource);
     MockFetchContext* context =
         MockFetchContext::create(MockFetchContext::kShouldLoadNewResource);
     ResourceFetcher* fetcher2 = ResourceFetcher::create(context);
-    FetchRequest fetchRequest2(m_resource->url(), FetchInitiatorInfo());
-    fetchRequest2.mutableResourceRequest().setCachePolicy(
-        WebCachePolicy::ValidatingCacheData);
+    ResourceRequest resourceRequest2(m_resource->url());
+    resourceRequest2.setCachePolicy(WebCachePolicy::ValidatingCacheData);
+    FetchRequest fetchRequest2(resourceRequest2, FetchInitiatorInfo());
     Resource* resource2 = MockResource::fetch(fetchRequest2, fetcher2);
     EXPECT_EQ(m_resource, resource2);
     m_notifyFinishedCalled = true;
   }
   bool notifyFinishedCalled() const { return m_notifyFinishedCalled; }
 
   DEFINE_INLINE_TRACE() {
     visitor->trace(m_resource);
     RawResourceClient::trace(visitor);
   }
@@ skipping 372 matching lines @@
   // Resource created by parser on the second fetcher
   FetchRequest fetchRequest2 = FetchRequest(url, FetchInitiatorInfo());
   Resource* newResource2 = MockResource::fetch(fetchRequest2, fetcher2);
   Persistent<MockResourceClient> client2 = new MockResourceClient(newResource2);
   EXPECT_NE(resource, newResource2);
   EXPECT_FALSE(fetcher2->isFetching());
   Platform::current()->getURLLoaderMockFactory()->serveAsynchronousRequests();
 }
 
 }  // namespace blink