[DevTools] Properly handle cache-only requests when cache is disabled

net/http/http_cache_transaction.cc

Index: net/http/http_cache_transaction.cc
diff --git a/net/http/http_cache_transaction.cc b/net/http/http_cache_transaction.cc
index 3ab072787cf9d9f73c8d8cde49919c60ec027424..864395529a42415db98491b312733c17b8ba55ec 100644
--- a/net/http/http_cache_transaction.cc
+++ b/net/http/http_cache_transaction.cc
@@ -902,6 +902,10 @@ int HttpCache::Transaction::DoGetBackendComplete(int result) {
 
     // Requested cache access mode.
     if (effective_load_flags_ & LOAD_ONLY_FROM_CACHE) {
+      if (effective_load_flags_ & LOAD_BYPASS_CACHE) {
+        // The client has asked for nonsense.
+        return ERR_CACHE_MISS;
+      }
       mode_ = READ;
     } else if (effective_load_flags_ & LOAD_BYPASS_CACHE) {
       mode_ = WRITE;