Always use an async TaskScheduler in TestBrowserThreadBundle.

chrome/browser/ui/webui/print_preview/extension_printer_handler_unittest.cc

 // Copyright 2015 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/ui/webui/print_preview/extension_printer_handler.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <queue>
 #include <string>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/values_test_util.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/test_extension_environment.h"
 #include "chrome/browser/printing/pwg_raster_converter.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/version_info/version_info.h"
+#include "content/public/test/test_utils.h"
 #include "device/base/mock_device_client.h"
 #include "device/usb/mock_usb_device.h"
 #include "device/usb/mock_usb_service.h"
 #include "extensions/browser/api/device_permissions_manager.h"
 #include "extensions/browser/api/printer_provider/printer_provider_api.h"
 #include "extensions/browser/api/printer_provider/printer_provider_api_factory.h"
 #include "extensions/browser/api/printer_provider/printer_provider_print_job.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/value_builder.h"
 #include "printing/pdf_render_settings.h"
@@ skipping 740 matching lines @@
   print_data->data() = "print data, PDF";
   base::string16 title = base::ASCIIToUTF16("Title");
 
   extension_printer_handler_->StartPrint(
       kPrinterId, kPWGRasterOnlyPrinterSimpleDescription, title,
       kEmptyPrintTicket, gfx::Size(100, 50), print_data,
       base::Bind(&RecordPrintResult, &call_count, &success, &status));
 
   EXPECT_EQ(0u, call_count);
 
-  base::RunLoop().RunUntilIdle();
+  content::RunAllBlockingPoolTasksUntilIdle();
 
   FakePrinterProviderAPI* fake_api = GetPrinterProviderAPI();
   ASSERT_TRUE(fake_api);
   ASSERT_EQ(1u, fake_api->pending_print_count());
 
   EXPECT_EQ(printing::TRANSFORM_NORMAL,
             pwg_raster_converter_->bitmap_settings().odd_page_transform);
   EXPECT_FALSE(pwg_raster_converter_->bitmap_settings().rotate_all_pages);
   EXPECT_FALSE(pwg_raster_converter_->bitmap_settings().reverse_page_order);
 
@@ skipping 33 matching lines @@
   print_data->data() = "print data, PDF";
   base::string16 title = base::ASCIIToUTF16("Title");
 
   extension_printer_handler_->StartPrint(
       kPrinterId, kPWGRasterOnlyPrinter, title, kPrintTicketWithDuplex,
       gfx::Size(100, 50), print_data,
       base::Bind(&RecordPrintResult, &call_count, &success, &status));
 
   EXPECT_EQ(0u, call_count);
 
-  base::RunLoop().RunUntilIdle();
+  content::RunAllBlockingPoolTasksUntilIdle();
 
   FakePrinterProviderAPI* fake_api = GetPrinterProviderAPI();
   ASSERT_TRUE(fake_api);
   ASSERT_EQ(1u, fake_api->pending_print_count());
 
   EXPECT_EQ(printing::TRANSFORM_FLIP_VERTICAL,
             pwg_raster_converter_->bitmap_settings().odd_page_transform);
   EXPECT_TRUE(pwg_raster_converter_->bitmap_settings().rotate_all_pages);
   EXPECT_TRUE(pwg_raster_converter_->bitmap_settings().reverse_page_order);
 
@@ skipping 33 matching lines @@
   print_data->data() = "print data, PDF";
   base::string16 title = base::ASCIIToUTF16("Title");
 
   extension_printer_handler_->StartPrint(
       kPrinterId, kPWGRasterOnlyPrinterSimpleDescription, title,
       kEmptyPrintTicket, gfx::Size(100, 50), print_data,
       base::Bind(&RecordPrintResult, &call_count, &success, &status));
 
   EXPECT_EQ(0u, call_count);
 
-  base::RunLoop().RunUntilIdle();
+  content::RunAllBlockingPoolTasksUntilIdle();
 
   FakePrinterProviderAPI* fake_api = GetPrinterProviderAPI();
   ASSERT_TRUE(fake_api);
   ASSERT_EQ(1u, fake_api->pending_print_count());
 
   extension_printer_handler_->Reset();
 
   fake_api->TriggerNextPrintCallback(kPrintRequestSuccess);
 
   EXPECT_EQ(0u, call_count);
@@ skipping 99 matching lines @@
       DictionaryBuilder()
           .Set("id", "printer1")
           .Set("name", "Printer 1")
           .Build());
 
   fake_api->TriggerNextUsbPrinterInfoCallback(*original_printer_info);
 
   EXPECT_EQ(0u, call_count);
   EXPECT_FALSE(printer_info.get());
 }