[WeakMemoryCache] Remove LRU lists, prune order control and live/dead distinction

third_party/WebKit/Source/core/css/CSSStyleSheetResourceTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/fetch/CSSStyleSheetResource.h"
 
 #include "core/css/CSSCrossfadeValue.h"
 #include "core/css/CSSImageValue.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSProperty.h"
@@ skipping 42 matching lines @@
   ~CSSStyleSheetResourceTest() override {
     replaceMemoryCacheForTesting(m_originalMemoryCache.release());
   }
 
   Document& document() { return m_page->document(); }
 
   Persistent<MemoryCache> m_originalMemoryCache;
   std::unique_ptr<DummyPageHolder> m_page;
 };
 
-TEST_F(CSSStyleSheetResourceTest, PruneCanCauseEviction) {
-  {
-    // We need this scope to remove all references.
-    KURL imageURL(KURL(), "https://localhost/image");
-    KURL cssURL(KURL(), "https://localhost/style.css");
-
-    // We need to disable loading because we manually give a response to
-    // the image resource.
-    document().fetcher()->setAutoLoadImages(false);
-
-    CSSStyleSheetResource* cssResource =
-        CSSStyleSheetResource::createForTest(ResourceRequest(cssURL), "utf-8");
-    memoryCache()->add(cssResource);
-    cssResource->responseReceived(
-        ResourceResponse(cssURL, "style/css", 0, nullAtom, String()), nullptr);
-    cssResource->finish();
-
-    StyleSheetContents* contents =
-        StyleSheetContents::create(CSSParserContext(HTMLStandardMode, nullptr));
-    CSSStyleSheet* sheet = CSSStyleSheet::create(contents, document());
-    EXPECT_TRUE(sheet);
-    CSSCrossfadeValue* crossfade = CSSCrossfadeValue::create(
-        CSSImageValue::create(String("image"), imageURL),
-        CSSImageValue::create(String("image"), imageURL),
-        CSSPrimitiveValue::create(1.0, CSSPrimitiveValue::UnitType::Number));
-    Vector<std::unique_ptr<CSSParserSelector>> selectors;
-    selectors.append(makeUnique<CSSParserSelector>());
-    selectors[0]->setMatch(CSSSelector::Id);
-    selectors[0]->setValue("foo");
-    CSSProperty property(CSSPropertyBackground, *crossfade);
-    contents->parserAppendRule(StyleRule::create(
-        CSSSelectorList::adoptSelectorVector(selectors),
-        ImmutableStylePropertySet::create(&property, 1, HTMLStandardMode)));
-
-    crossfade->loadSubimages(document());
-    Resource* imageResource = memoryCache()->resourceForURL(
-        imageURL, MemoryCache::defaultCacheIdentifier());
-    ASSERT_TRUE(imageResource);
-    ResourceResponse imageResponse;
-    imageResponse.setURL(imageURL);
-    imageResponse.setHTTPHeaderField("cache-control", "no-store");
-    imageResource->responseReceived(imageResponse, nullptr);
-
-    contents->checkLoaded();
-    cssResource->saveParsedStyleSheet(contents);
-
-    memoryCache()->update(cssResource, cssResource->size(), cssResource->size(),
-                          false);
-    memoryCache()->update(imageResource, imageResource->size(),
-                          imageResource->size(), false);
-    if (!memoryCache()->isInSameLRUListForTest(cssResource, imageResource)) {
-      // We assume that the LRU list is determined by |size / accessCount|.
-      for (size_t i = 0; i < cssResource->size() + 1; ++i)
-        memoryCache()->update(cssResource, cssResource->size(),
-                              cssResource->size(), true);
-      for (size_t i = 0; i < imageResource->size() + 1; ++i)
-        memoryCache()->update(imageResource, imageResource->size(),
-                              imageResource->size(), true);
-    }
-    ASSERT_TRUE(
-        memoryCache()->isInSameLRUListForTest(cssResource, imageResource));
-  }
-  ThreadState::current()->collectAllGarbage();
-  // This operation should not lead to crash!
-  memoryCache()->pruneAll();
-}
-
 TEST_F(CSSStyleSheetResourceTest, DuplicateResourceNotCached) {
   const char url[] = "https://localhost/style.css";
   KURL imageURL(KURL(), url);
   KURL cssURL(KURL(), url);
 
   // Emulate using <img> to do async stylesheet preloads.
 
   Resource* imageResource = ImageResource::create(ResourceRequest(imageURL));
   ASSERT_TRUE(imageResource);
   memoryCache()->add(imageResource);
@@ skipping 17 matching lines @@
   // The underlying |contents| for the stylesheet resource must have a
   // matching reference status.
   EXPECT_TRUE(memoryCache()->contains(imageResource));
   EXPECT_FALSE(memoryCache()->contains(cssResource));
   EXPECT_FALSE(contents->isReferencedFromResource());
   EXPECT_FALSE(cssResource->restoreParsedStyleSheet(parserContext));
 }
 
 }  // namespace
 }  // namespace blink