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

third_party/WebKit/public/platform/WebCachePolicy.h

Index: third_party/WebKit/public/platform/WebCachePolicy.h
diff --git a/third_party/WebKit/public/platform/WebCachePolicy.h b/third_party/WebKit/public/platform/WebCachePolicy.h
index 553767ddff0580eb48cc44c0ca667ef5be77a629..bbcdec55ba873067673d767cba716430f882993b 100644
--- a/third_party/WebKit/public/platform/WebCachePolicy.h
+++ b/third_party/WebKit/public/platform/WebCachePolicy.h
@@ -15,6 +15,8 @@ enum class WebCachePolicy {
                             // data
   ReturnCacheDataDontLoad,  // results of a post - allow stale data and only use
                             // cache
+  BypassCacheLoadOnlyFromCache,  // for cache-only load when disable cache
+                                 // is enabled. Results in a network error.
 };
 
 }  // namespace blink