Fix integration tests in src/chrome and src/extensions so that we can turn on IO thread checks wi...

chrome/browser/policy/policy_prefs_browsertest.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 <stddef.h>
 
 #include <algorithm>
 #include <cstdlib>
 #include <map>
 #include <memory>
 #include <sstream>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/search_test_utils.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ skipping 188 matching lines @@
 };
 
 // Parses all policy test cases and makes them available in a map.
 class PolicyTestCases {
  public:
   typedef std::vector<PolicyTestCase*> PolicyTestCaseVector;
   typedef std::map<std::string, PolicyTestCaseVector> PolicyTestCaseMap;
   typedef PolicyTestCaseMap::const_iterator iterator;
 
   PolicyTestCases() {
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
     base::FilePath path = ui_test_utils::GetTestFilePath(
         base::FilePath(FILE_PATH_LITERAL("policy")),
         base::FilePath(FILE_PATH_LITERAL("policy_test_cases.json")));
     std::string json;
     if (!base::ReadFileToString(path, &json)) {
       ADD_FAILURE();
       return;
     }
     int error_code = -1;
     std::string error_string;
@@ skipping 521 matching lines @@
       }
     }
   }
 }
 
 INSTANTIATE_TEST_CASE_P(PolicyPrefIndicatorTestInstance,
                         PolicyPrefIndicatorTest,
                         testing::ValuesIn(SplitPoliciesIntoChunks(10)));
 
 }  // namespace policy