predictors: Don't record URLs with a port.

chrome/browser/predictors/resource_prefetch_predictor_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 <stddef.h>
 
 #include <set>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 312 matching lines @@
     embedded_test_server()->RegisterRequestHandler(
         base::Bind(&ResourcePrefetchPredictorBrowserTest::HandleResourceRequest,
                    base::Unretained(this)));
     embedded_test_server()->RegisterRequestMonitor(base::Bind(
         &ResourcePrefetchPredictorBrowserTest::MonitorResourceRequest,
         base::Unretained(this)));
     ASSERT_TRUE(embedded_test_server()->Start());
     predictor_ =
         ResourcePrefetchPredictorFactory::GetForProfile(browser()->profile());
     ASSERT_TRUE(predictor_);
+    // URLs from the test server contain a port number.
+    ResourcePrefetchPredictor::SetAllowPortInUrlsForTesting(true);
     EnsurePredictorInitialized();
     histogram_tester_.reset(new base::HistogramTester());
   }
 
+  void TearDownOnMainThread() override {
+    ResourcePrefetchPredictor::SetAllowPortInUrlsForTesting(false);

[droger, 2017/03/16 12:02:27]

Nit, optional: Could we use ScopedClosureRunner to automatically reset this at
destruction?

+  }
+
   void TestLearningAndPrefetching(const GURL& main_frame_url) {
     // Navigate to |main_frame_url| and check all the expectations.
     NavigateToURLAndCheckSubresources(main_frame_url);
     ClearCache();
     // It is needed to have at least two resource hits to trigger prefetch.
     NavigateToURLAndCheckSubresources(main_frame_url);
     ClearCache();
     // Prefetch all needed resources and change expectations so that all
     // cacheable resources should be served from cache next navigation.
     PrefetchURL(main_frame_url);
@@ skipping 624 matching lines @@
               net::HIGHEST);
 
   NavigateToURLAndCheckSubresources(initial_url);
   ClearCache();
   NavigateToURLAndCheckSubresources(initial_url);
   ClearCache();
   NavigateToURLAndCheckPrefetching(initial_url);
 }
 
 }  // namespace predictors