Do not initiate revalidation of Resource with redirects from MemoryCache

BUG=613971

Review-Url: https://codereview.chromium.org/2011283002
Cr-Commit-Position: refs/heads/master@{#397064}
(cherry picked from commit 64ad58e)

Review URL: https://codereview.chromium.org/2044483002 .

Cr-Commit-Position: refs/branch-heads/2743@{crosswalk-project#235}
Cr-Branched-From: 2b3ae3b-refs/heads/master@{#394939}

Author: hiroshige-g

third_party/WebKit/Source/core/fetch/Resource.cpp

@@ -960,6 +960,11 @@ bool Resource::canUseCacheValidator()
 
     if (hasCacheControlNoStoreHeader())
         return false;
+
+    // Do not revalidate Resource with redirects. https://crbug.com/613971
+    if (!redirectChain().isEmpty())
+        return false;
+
     return m_response.hasCacheValidatorFields() || m_resourceRequest.hasCacheValidatorFields();
 }