Handle online and offline redirects via interceptor and offline scheme

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

Index: third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
index 31e8389897ba03dbbff62479cf5bd80ba306983d..87eca70b07cc77e89c0cad94aa5e9f4801c77535 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
+++ b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
@@ -894,7 +894,7 @@ ArchiveResource* ResourceFetcher::createArchive(Resource* resource)
     // Only the top-frame can load MHTML.
     if (!context().isMainFrame())
         return nullptr;
-    m_archive = MHTMLArchive::create(resource->url(), resource->resourceBuffer());
+    m_archive = MHTMLArchive::create(resource->lastResourceRequest().url(), resource->resourceBuffer());
     return m_archive ? m_archive->mainResource() : nullptr;
 }