Rewrite scoped_ptr<T>(NULL) to use the default ctor in chrome/.

chrome/browser/predictors/resource_prefetch_predictor_unittest.cc

 // Copyright (c) 2012 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 <iostream>
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/run_loop.h"
 #include "base/time.h"
@@ skipping 156 matching lines @@
   PrefetchDataMap test_host_data_;
   PrefetchData empty_url_data_;
   PrefetchData empty_host_data_;
 };
 
 ResourcePrefetchPredictorTest::ResourcePrefetchPredictorTest()
     : loop_(base::MessageLoop::TYPE_DEFAULT),
       ui_thread_(content::BrowserThread::UI, &loop_),
       db_thread_(content::BrowserThread::DB, &loop_),
       profile_(new TestingProfile()),
-      predictor_(NULL),
       mock_tables_(new StrictMock<MockResourcePrefetchPredictorTables>()),
       empty_url_data_(PREFETCH_KEY_TYPE_URL, std::string()),
       empty_host_data_(PREFETCH_KEY_TYPE_HOST, std::string()) {}
 
 ResourcePrefetchPredictorTest::~ResourcePrefetchPredictorTest() {
   profile_.reset(NULL);
   loop_.RunUntilIdle();
 }
 
 void ResourcePrefetchPredictorTest::SetUp() {
@@ skipping 730 matching lines @@
       predictor_->inflight_navigations_[main_frame1.navigation_id]->at(0)));
   EXPECT_TRUE(URLRequestSummaryAreEqual(
       resource2,
       predictor_->inflight_navigations_[main_frame1.navigation_id]->at(1)));
   EXPECT_TRUE(URLRequestSummaryAreEqual(
       resource3,
       predictor_->inflight_navigations_[main_frame1.navigation_id]->at(2)));
 }
 
 }  // namespace predictors