predictors: Reduce the maximum concurrent prefetches.

chrome/browser/predictors/resource_prefetcher_unittest.cc

 // Copyright 2014 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 "chrome/browser/predictors/resource_prefetcher.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 126 matching lines @@
   std::unique_ptr<TestResourcePrefetcher> prefetcher_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ResourcePrefetcherTest);
 };
 
 ResourcePrefetcherTest::ResourcePrefetcherTest()
     : loop_(base::MessageLoop::TYPE_IO),
       io_thread_(content::BrowserThread::IO, &loop_),
       prefetcher_delegate_(&loop_) {
-  config_.max_prefetches_inflight_per_navigation = 5;
   config_.max_prefetches_inflight_per_host_per_navigation = 2;
 }
 
 ResourcePrefetcherTest::~ResourcePrefetcherTest() {
 }
 
 TEST_F(ResourcePrefetcherTest, TestPrefetcherFinishes) {
   GURL main_frame_url("http://www.google.com");
   std::vector<GURL> urls = {GURL("http://www.google.com/resource1.html"),
                             GURL("http://www.google.com/resource2.png"),
@@ skipping 111 matching lines @@
 
   // Expect the final call.
   EXPECT_CALL(prefetcher_delegate_,
               ResourcePrefetcherFinished(Eq(prefetcher_.get())));
 
   OnResponse("http://m.google.com/resource1.jpg");
   CheckPrefetcherState(0, 1, 0);
 }
 
 }  // namespace predictors