Revert of MemoryCache: make sure that Resources are evicted only when they can be deleted

Source/core/fetch/Resource.cpp

Index: Source/core/fetch/Resource.cpp
diff --git a/Source/core/fetch/Resource.cpp b/Source/core/fetch/Resource.cpp
index a58d4e3819ecf82bf45a6d62c936a9f4f387ce1a..8de53059160fd0e7cf8cb2198f29297b80c8bb0f 100644
--- a/Source/core/fetch/Resource.cpp
+++ b/Source/core/fetch/Resource.cpp
@@ -364,11 +364,6 @@
     return true;
 }
 
-bool Resource::hasRightHandleCountApartFromCache(unsigned targetCount) const
-{
-    return m_handleCount == targetCount + memoryCache()->contains(this);
-}
-
 void Resource::responseReceived(const ResourceResponse& response)
 {
     setResponse(response);
@@ -406,17 +401,6 @@
     m_cachedMetadata = CachedMetadata::create(dataTypeID, data, size);
     const Vector<char>& serializedData = m_cachedMetadata->serialize();
     blink::Platform::current()->cacheMetadata(m_response.url(), m_response.responseTime(), serializedData.data(), serializedData.size());
-}
-
-bool Resource::canDelete() const
-{
-    return !hasClients() && !m_loader && !m_preloadCount && hasRightHandleCountApartFromCache(0)
-        && !m_protectorCount && !m_resourceToRevalidate && !m_proxyResource;
-}
-
-bool Resource::hasOneHandleApartFromCache() const
-{
-    return hasRightHandleCountApartFromCache(1);
 }
 
 CachedMetadata* Resource::cachedMetadata(unsigned dataTypeID) const
@@ -787,8 +771,6 @@
         unlock();
     } else if (m_handleCount == 1 && memoryCache()->contains(this)) {
         unlock();
-        if (!hasClients())
-            memoryCache()->prune(this);
     }
 }