X-DevTools-Emulate-Network-Conditions-Client-Id header shouldn't block cache reuse

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

 /*
  * Copyright (C) 2011 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/fetch/RawResource.h"
 
 #include "core/fetch/FetchRequest.h"
 #include "core/fetch/MemoryCache.h"
 #include "core/fetch/ResourceClientOrObserverWalker.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/fetch/ResourceLoader.h"
+#include "platform/HTTPNames.h"
 
 namespace blink {
 
 Resource* RawResource::fetchSynchronously(FetchRequest& request, ResourceFetcher* fetcher)
 {
     request.mutableResourceRequest().setTimeoutInterval(10);
     ResourceLoaderOptions options(request.options());
     options.synchronousPolicy = RequestSynchronously;
     request.setOptions(options);
     return fetcher->requestResource(request, RawResourceFactory(Resource::Raw));
@@ skipping 162 matching lines @@
     DEFINE_STATIC_LOCAL(HashSet<AtomicString>, m_headers, ());
     if (m_headers.isEmpty()) {
         m_headers.add("Cache-Control");
         m_headers.add("If-Modified-Since");
         m_headers.add("If-None-Match");
         m_headers.add("Origin");
         m_headers.add("Pragma");
         m_headers.add("Purpose");
         m_headers.add("Referer");
         m_headers.add("User-Agent");
+        m_headers.add(HTTPNames::X_DevTools_Emulate_Network_Conditions_Client_Id);
     }
     return m_headers.contains(headerName);
 }
 
 static bool isCacheableHTTPMethod(const AtomicString& method)
 {
     // Per http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.10,
     // these methods always invalidate the cache entry.
     return method != "POST" && method != "PUT" && method != "DELETE";
 }
@@ skipping 30 matching lines @@
     for (const auto& header : oldHeaders) {
         AtomicString headerName = header.key;
         if (!shouldIgnoreHeaderForCacheReuse(headerName) && header.value != newHeaders.get(headerName))
             return false;
     }
 
     return true;
 }
 
 } // namespace blink