Fixes the cache lock issue.

net/http/http_cache_lookup_manager_unittest.cc

Index: net/http/http_cache_lookup_manager_unittest.cc
diff --git a/net/http/http_cache_lookup_manager_unittest.cc b/net/http/http_cache_lookup_manager_unittest.cc
index 32769880882d87513497febd25e71fccd45484db..1e207ba4f2ea3c259214e19db95a5a9494794d91 100644
--- a/net/http/http_cache_lookup_manager_unittest.cc
+++ b/net/http/http_cache_lookup_manager_unittest.cc
@@ -52,12 +52,12 @@ void PopulateCacheEntry(HttpCache* cache, const GURL& request_url) {
 
   MockHttpRequest request(*(mock_trans.get()));
 
-  std::unique_ptr<HttpTransaction> trans;
-  int rv = cache->CreateTransaction(DEFAULT_PRIORITY, &trans);
+  Context* c = new Context();
+  int rv = cache->CreateTransaction(DEFAULT_PRIORITY, &c->trans);
   EXPECT_THAT(rv, IsOk());
-  ASSERT_TRUE(trans.get());
+  ASSERT_TRUE(c->trans.get());
 
-  rv = trans->Start(&request, callback.callback(), NetLogWithSource());
+  rv = c->trans->Start(&request, callback.callback(), NetLogWithSource());
   base::RunLoop().RunUntilIdle();
 
   if (rv == ERR_IO_PENDING)
@@ -67,16 +67,18 @@ void PopulateCacheEntry(HttpCache* cache, const GURL& request_url) {
   if (OK != rv)
     return;
 
-  const HttpResponseInfo* response = trans->GetResponseInfo();
+  const HttpResponseInfo* response = c->trans->GetResponseInfo();
   ASSERT_TRUE(response);
 
   std::string content;
-  rv = ReadTransaction(trans.get(), &content);
+  rv = ReadTransaction(c->trans.get(), &content);
 
   EXPECT_THAT(rv, IsOk());
   std::string expected(mock_trans->data);
   EXPECT_EQ(expected, content);
   RemoveMockTransaction(mock_trans.get());
+
+  delete c;
 }
 
 }  // namespace