Actually handle the Vary header in blink, rather than punting on sight.

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 136 matching lines @@
   KURL url(ParsedURLString, "http://127.0.0.1:8000/foo.html");
   Resource* resource = RawResource::create(url, Resource::Raw);
   memoryCache()->add(resource);
   ResourceResponse response;
   response.setURL(url);
   response.setHTTPStatusCode(200);
   response.setHTTPHeaderField(HTTPNames::Cache_Control, "max-age=3600");
   response.setHTTPHeaderField(HTTPNames::Vary, "*");
   resource->responseReceived(response, nullptr);
   resource->finish();
-  ASSERT_TRUE(resource->hasVaryHeader());
+  ASSERT_TRUE(resource->mustReloadDueToVaryHeader(url));
 
   ResourceFetcher* fetcher = ResourceFetcher::create(context());
   ResourceRequest resourceRequest(url);
   resourceRequest.setRequestContext(WebURLRequest::RequestContextInternal);
   FetchRequest fetchRequest =
       FetchRequest(resourceRequest, FetchInitiatorInfo());
   Platform::current()->getURLLoaderMockFactory()->registerURL(
       url, WebURLResponse(), "");
   Resource* newResource = RawResource::fetch(fetchRequest, fetcher);
   EXPECT_NE(resource, newResource);
@@ skipping 45 matching lines @@
   KURL url(ParsedURLString, "http://127.0.0.1:8000/foo.html");
   Resource* resource = RawResource::create(url, Resource::Raw);
   memoryCache()->add(resource);
   ResourceResponse response;
   response.setURL(url);
   response.setHTTPStatusCode(200);
   response.setHTTPHeaderField(HTTPNames::Cache_Control, "max-age=3600");
   response.setHTTPHeaderField(HTTPNames::Vary, "*");
   resource->responseReceived(response, nullptr);
   resource->finish();
-  ASSERT_TRUE(resource->hasVaryHeader());
+  ASSERT_TRUE(resource->mustReloadDueToVaryHeader(url));
 
   ResourceRequest resourceRequest(url);
   resourceRequest.setRequestContext(WebURLRequest::RequestContextInternal);
   FetchRequest fetchRequest =
       FetchRequest(resourceRequest, FetchInitiatorInfo());
   Resource* newResource = RawResource::fetch(fetchRequest, fetcher);
   EXPECT_EQ(resource, newResource);
 }
 
 TEST_F(ResourceFetcherTest, VaryResource) {
   ResourceFetcher* fetcher = ResourceFetcher::create(context());
 
   KURL url(ParsedURLString, "http://127.0.0.1:8000/foo.html");
   ResourceResponse response;
   response.setURL(url);
   response.setHTTPStatusCode(200);
   response.setHTTPHeaderField(HTTPNames::Cache_Control, "max-age=3600");
   response.setHTTPHeaderField(HTTPNames::Vary, "*");
   registerMockedURLLoadWithCustomResponse(url, response);
 
   FetchRequest fetchRequestOriginal = FetchRequest(url, FetchInitiatorInfo());
   Resource* resource = MockResource::fetch(fetchRequestOriginal, fetcher);
   ASSERT_TRUE(resource);
   Platform::current()->getURLLoaderMockFactory()->serveAsynchronousRequests();
-  ASSERT_TRUE(resource->hasVaryHeader());
+  ASSERT_TRUE(resource->mustReloadDueToVaryHeader(url));
 
   FetchRequest fetchRequest = FetchRequest(url, FetchInitiatorInfo());
   Resource* newResource = MockResource::fetch(fetchRequest, fetcher);
   EXPECT_EQ(resource, newResource);
 }
 
 class RequestSameResourceOnComplete
     : public GarbageCollectedFinalized<RequestSameResourceOnComplete>,
       public RawResourceClient {
   USING_GARBAGE_COLLECTED_MIXIN(RequestSameResourceOnComplete);
@@ skipping 393 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_EQ(resource, newResource2);
   EXPECT_FALSE(fetcher2->isFetching());
   Platform::current()->getURLLoaderMockFactory()->serveAsynchronousRequests();
 }
 
 }  // namespace blink