More aggressive IO asserts in browser_tests.

chrome/test/base/in_process_browser_test.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 "chrome/test/base/in_process_browser_test.h"
 
 #include "ash/common/ash_switches.h"
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/path_service.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/test_file_util.h"
 #include "base/threading/non_thread_safe.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/after_startup_task_utils.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/net/net_error_tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ skipping 501 matching lines @@
   // run_accessibility_checks_for_test_case_ must be set before calling
   // SetUpOnMainThread or RunTestOnMainThread so that one or all tests can
   // enable/disable the accessibility audit.
   run_accessibility_checks_for_test_case_ = false;
 
   SetUpOnMainThread();
 #if defined(OS_MACOSX)
   autorelease_pool_->Recycle();
 #endif
 
-  if (!HasFatalFailure())
+  if (!HasFatalFailure()) {
+    bool old_io_allowed_value = base::ThreadRestrictions::SetIOAllowed(false);
     RunTestOnMainThread();
+    base::ThreadRestrictions::SetIOAllowed(old_io_allowed_value);
+  }
 #if defined(OS_MACOSX)
   autorelease_pool_->Recycle();
 #endif
 
   if (run_accessibility_checks_for_test_case_) {
     std::string error_message;
     EXPECT_TRUE(RunAccessibilityChecks(&error_message));
     EXPECT_EQ("", error_message);
   }
 
@@ skipping 36 matching lines @@
   // On the Mac, this eventually reaches
   // -[BrowserWindowController windowWillClose:], which will post a deferred
   // -autorelease on itself to ultimately destroy the Browser object. The line
   // below is necessary to pump these pending messages to ensure all Browsers
   // get deleted.
   content::RunAllPendingInMessageLoop();
   delete autorelease_pool_;
   autorelease_pool_ = NULL;
 #endif
 }