Don't revalidate all resources for FrameLoadTypeSame

Source/core/loader/FrameFetchContext.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 148 matching lines @@
 ResourceRequestCachePolicy FrameFetchContext::resourceRequestCachePolicy(const ResourceRequest& request, Resource::Type type) const
 {
     if (type == Resource::MainResource) {
         FrameLoadType frameLoadType = frame()->loader().loadType();
         if (request.httpMethod() == "POST" && frameLoadType == FrameLoadTypeBackForward)
             return ReturnCacheDataDontLoad;
         if (!frame()->host()->overrideEncoding().isEmpty() || frameLoadType == FrameLoadTypeBackForward)
             return ReturnCacheDataElseLoad;
         if (frameLoadType == FrameLoadTypeReloadFromOrigin)
             return ReloadBypassingCache;
-        if (frameLoadType == FrameLoadTypeReload || frameLoadType == FrameLoadTypeSame || request.isConditional() || request.httpMethod() == "POST")
+        if (frameLoadType == FrameLoadTypeReload || request.isConditional() || request.httpMethod() == "POST")
             return ReloadIgnoringCacheData;
         Frame* parent = frame()->tree().parent();
         if (parent && parent->isLocalFrame())
             return toLocalFrame(parent)->document()->fetcher()->context().resourceRequestCachePolicy(request, type);
         return UseProtocolCachePolicy;
     }
 
     if (request.isConditional())
         return ReloadIgnoringCacheData;
 
@@ skipping 481 matching lines @@
     return !frame()->isMainFrame() && frame()->settings() && frame()->settings()->lowPriorityIframes();
 }
 
 DEFINE_TRACE(FrameFetchContext)
 {
     visitor->trace(m_document);
     FetchContext::trace(visitor);
 }
 
 } // namespace blink