ImageResource: Reset the encoded image size after receiving all data

third_party/WebKit/Source/core/fetch/ImageResourceTest.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 330 matching lines @@
       ResourceResponse(KURL(), "multipart/x-mixed-replace", 0, nullAtom,
                        String()),
       nullptr);
 
   Vector<unsigned char> jpeg = jpegImage();
   cachedImage->responseReceived(
       ResourceResponse(KURL(), "image/jpeg", jpeg.size(), nullAtom, String()),
       nullptr);
   cachedImage->appendData(reinterpret_cast<const char*>(jpeg.data()),
                           jpeg.size());
+  EXPECT_NE(0u, cachedImage->encodedSizeMemoryUsageForTesting());
   cachedImage->finish();
+  EXPECT_EQ(0u, cachedImage->encodedSizeMemoryUsageForTesting());
   EXPECT_FALSE(cachedImage->errorOccurred());
   ASSERT_TRUE(cachedImage->hasImage());
   EXPECT_FALSE(cachedImage->getImage()->isNull());
   EXPECT_TRUE(client->notifyFinishedCalled());
 
   // The prune comes when the ImageResource still has clients. The image should
   // not be deleted.
   cachedImage->prune();
   EXPECT_TRUE(cachedImage->isAlive());
   ASSERT_TRUE(cachedImage->hasImage());
@@ skipping 421 matching lines @@
       nullptr, WrappedResourceResponse(ResourceResponse(
                    testURL, "image/jpeg", 18, nullAtom, String())),
       nullptr);
   cachedImage->loader()->didReceiveData(nullptr, "notactuallyanimage", 18, 18,
                                         18);
   EXPECT_EQ(Resource::DecodeError, cachedImage->getStatus());
   EXPECT_FALSE(cachedImage->isLoading());
 }
 
 }  // namespace blink