Disable ReloadCacheControlBrowserTest if PlzNavigate is enabled

content/browser/loader/reload_cache_control_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 139 matching lines @@
     EXPECT_EQ(kNoCacheControl, request_log_[13].cache_control);
     EXPECT_EQ(kReloadFramePath, request_log_[14].relative_url);
     EXPECT_EQ(kNoCacheControl, request_log_[14].cache_control);
     EXPECT_EQ(kReloadImagePath, request_log_[15].relative_url);
     EXPECT_EQ(kNoCacheControl, request_log_[15].cache_control);
   }
 }
 
 // Test if bypassing reload issues requests with proper cache control flags.
 IN_PROC_BROWSER_TEST_F(ReloadCacheControlBrowserTest, BypassingReload) {
+  // TODO(crbug.com/671545): This test gets to be unstable if browser-side
+  // navigation is enabled. This is because we can not ensure which of frame and
+  // image requests hits the network first.
+  if (IsBrowserSideNavigationEnabled())
+    return;
+
   GURL url(embedded_test_server()->GetURL(kReloadTestPath));
 
   EXPECT_TRUE(NavigateToURL(shell(), url));
   ReloadBypassingCacheBlockUntilNavigationsComplete(shell(), 1);
 
   {
     base::AutoLock lock(request_log_lock_);
     ASSERT_EQ(8UL, request_log_.size());
     EXPECT_EQ(kReloadTestPath, request_log_[0].relative_url);
     EXPECT_EQ(kNoCacheControl, request_log_[0].cache_control);
@@ skipping 129 matching lines @@
     EXPECT_EQ(kReloadFramePath, request_log_[14].relative_url);
     EXPECT_EQ(kNoCacheControl, request_log_[14].cache_control);
     EXPECT_EQ(kReloadImagePath, request_log_[15].relative_url);
     EXPECT_EQ(kNoCacheControl, request_log_[15].cache_control);
   }
 }
 
 }  // namespace
 
 }  // namespace content