Bounce all requests off the cache lock after 25ms.

net/http/http_cache_unittest.cc

Index: net/http/http_cache_unittest.cc
diff --git a/net/http/http_cache_unittest.cc b/net/http/http_cache_unittest.cc
index 84dec613ce141988ce495dd4c2d98bbc757ff023..c2943a93351b3e3c91ca1340f0da0a8ed643958c 100644
--- a/net/http/http_cache_unittest.cc
+++ b/net/http/http_cache_unittest.cc
@@ -1688,11 +1688,10 @@ TEST(HttpCache, SimpleGET_ManyWriters_BypassCache) {
   }
 }
 
-// Tests that a (simulated) timeout allows transactions waiting on the cache
-// lock to continue.
+// Tests that a short timeout allows transactions waiting on the cache lock to
+// continue.
 TEST(HttpCache, SimpleGET_WriterTimeout) {
   MockHttpCache cache;
-  cache.BypassCacheLock();
 
   MockHttpRequest request(kSimpleGET_Transaction);
   Context c1, c2;