Revert of Revalidate using the same Resource, attempt #2

Source/core/fetch/RawResourceTest.cpp

Index: Source/core/fetch/RawResourceTest.cpp
diff --git a/Source/core/fetch/RawResourceTest.cpp b/Source/core/fetch/RawResourceTest.cpp
index 64bae21136e9f21da56324b6dfdda47cae902ccd..a2452ce4c34407707312fd78ae2941800372fb62 100644
--- a/Source/core/fetch/RawResourceTest.cpp
+++ b/Source/core/fetch/RawResourceTest.cpp
@@ -60,24 +60,26 @@
 
 TEST(RawResourceTest, RevalidationSucceeded)
 {
-    ResourcePtr<Resource> resource(new RawResource(ResourceRequest("data:text/html,"), Resource::Raw));
-    ResourceResponse response;
-    response.setHTTPStatusCode(200);
-    resource->responseReceived(response, nullptr);
-    const char data[5] = "abcd";
-    resource->appendData(data, 4);
-    resource->finish();
-    memoryCache()->add(resource.get());
+    // Create two RawResources and set one to revalidate the other.
+    RawResource* oldResourcePointer = new RawResource(ResourceRequest("data:text/html,"), Resource::Raw);
+    RawResource* newResourcePointer = new RawResource(ResourceRequest("data:text/html,"), Resource::Raw);
+    newResourcePointer->setResourceToRevalidate(oldResourcePointer);
+    ResourcePtr<Resource> oldResource = oldResourcePointer;
+    ResourcePtr<Resource> newResource = newResourcePointer;
+    memoryCache()->add(oldResource.get());
+    memoryCache()->remove(oldResource.get());
+    memoryCache()->add(newResource.get());
 
     // Simulate a successful revalidation.
-    resource->setRevalidatingRequest(ResourceRequest("data:text/html,"));
-    ResourceResponse revalidatingResponse;
-    revalidatingResponse.setHTTPStatusCode(304);
-    resource->responseReceived(revalidatingResponse, nullptr);
-    EXPECT_FALSE(resource->isCacheValidator());
-    EXPECT_EQ(200, resource->response().httpStatusCode());
-    EXPECT_EQ(4u, resource->resourceBuffer()->size());
-    EXPECT_EQ(memoryCache()->resourceForURL(KURL(ParsedURLString, "data:text/html,")), resource.get());
+    // The revalidated resource (oldResource) should now be in the cache, newResource
+    // should have been sliently switched to point to the revalidated resource, and
+    // we shouldn't hit any ASSERTs.
+    ResourceResponse response;
+    response.setHTTPStatusCode(304);
+    newResource->responseReceived(response, nullptr);
+    EXPECT_EQ(memoryCache()->resourceForURL(KURL(ParsedURLString, "data:text/html,")), oldResource.get());
+    EXPECT_EQ(oldResource.get(), newResource.get());
+    EXPECT_NE(newResource.get(), newResourcePointer);
 }
 
 class DummyClient : public RawResourceClient {