Split browser-specific and generic code in components/task_scheduler_util/.

components/task_scheduler_util/initialization/browser_util.cc

 // Copyright 2016 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.
 
+// TODO(fdoray): Remove this file once TaskScheduler initialization in the
+// browser process uses the components/task_scheduler_util/browser/ API on all
+// platforms.
+
 #include "components/task_scheduler_util/initialization/browser_util.h"
 
-#include <map>
-#include <string>
-
-#include "base/task_scheduler/initialization_util.h"
-#include "base/task_scheduler/switches.h"
-#include "base/task_scheduler/task_traits.h"
-#include "base/threading/sequenced_worker_pool.h"
+#include "components/task_scheduler_util/browser/initialization.h"
 
 namespace task_scheduler_util {
 namespace initialization {
 
-namespace {
-
-using StandbyThreadPolicy =
-    base::SchedulerWorkerPoolParams::StandbyThreadPolicy;
-using ThreadPriority = base::ThreadPriority;
-
-struct SchedulerWorkerPoolCustomizableConfiguration {
-  SchedulerWorkerPoolCustomizableConfiguration(
-      const char* name_in,
-      ThreadPriority priority_hint_in,
-      const SingleWorkerPoolConfiguration& single_worker_pool_config_in)
-      : name(name_in),
-        priority_hint(priority_hint_in),
-        single_worker_pool_config(single_worker_pool_config_in) {}
-
-  const char* name;
-  ThreadPriority priority_hint;
-  const SingleWorkerPoolConfiguration& single_worker_pool_config;
-};
-
-}  // namespace
-
-std::vector<base::SchedulerWorkerPoolParams>
-BrowserWorkerPoolConfigurationToSchedulerWorkerPoolParams(
-    const BrowserWorkerPoolsConfiguration& config) {
-  const SchedulerWorkerPoolCustomizableConfiguration worker_pool_config[] = {
-      SchedulerWorkerPoolCustomizableConfiguration("Background",
-                                                   ThreadPriority::BACKGROUND,
-                                                   config.background),
-      SchedulerWorkerPoolCustomizableConfiguration("BackgroundFileIO",
-                                                   ThreadPriority::BACKGROUND,
-                                                   config.background_file_io),
-      SchedulerWorkerPoolCustomizableConfiguration("Foreground",
-                                                   ThreadPriority::NORMAL,
-                                                   config.foreground),
-      SchedulerWorkerPoolCustomizableConfiguration("ForegroundFileIO",
-                                                   ThreadPriority::NORMAL,
-                                                   config.foreground_file_io),
-
-  };
-  static_assert(arraysize(worker_pool_config) == WORKER_POOL_COUNT,
-                "Mismatched Worker Pool Types and Predefined Parameters");
-  constexpr size_t kNumWorkerPoolsDefined = sizeof(config) /
-                                            sizeof(config.background);
-  static_assert(arraysize(worker_pool_config) == kNumWorkerPoolsDefined,
-                "Mismatch in predefined parameters and worker pools.");
-  std::vector<base::SchedulerWorkerPoolParams> params_vector;
-  for (const auto& config : worker_pool_config) {
-    params_vector.emplace_back(
-        config.name, config.priority_hint,
-        config.single_worker_pool_config.standby_thread_policy,
-        config.single_worker_pool_config.threads,
-        config.single_worker_pool_config.detach_period);
-  }
-  DCHECK_EQ(WORKER_POOL_COUNT, params_vector.size());
-  return params_vector;
-}
-
 // Returns the worker pool index for |traits| defaulting to FOREGROUND or
 // FOREGROUND_FILE_IO on any priorities other than background.
 size_t BrowserWorkerPoolIndexForTraits(const base::TaskTraits& traits) {
-  const bool is_background =
-      traits.priority() == base::TaskPriority::BACKGROUND;
-  if (traits.with_file_io())
-    return is_background ? BACKGROUND_FILE_IO : FOREGROUND_FILE_IO;
-
-  return is_background ? BACKGROUND : FOREGROUND;
+  return ::task_scheduler_util::BrowserWorkerPoolIndexForTraits(traits);
 }
 
 #if defined(OS_IOS)
 std::vector<base::SchedulerWorkerPoolParams>
 GetDefaultBrowserSchedulerWorkerPoolParams() {
-  constexpr size_t kNumWorkerPoolsDefined =
-      sizeof(BrowserWorkerPoolsConfiguration) /
-      sizeof(SingleWorkerPoolConfiguration);
-  static_assert(kNumWorkerPoolsDefined == 4,
-                "Expected 4 worker pools in BrowserWorkerPoolsConfiguration");
-  BrowserWorkerPoolsConfiguration config;
-  constexpr size_t kSizeAssignedFields =
-      sizeof(config.background.threads) +
-      sizeof(config.background.detach_period) +
-      sizeof(config.background.standby_thread_policy);
-  static_assert(kSizeAssignedFields == sizeof(config.background),
-                "Not all fields were assigned");
-  config.background.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.background.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(2, 8, 0.1, 0);
-  config.background.detach_period = base::TimeDelta::FromSeconds(30);
-
-  config.background_file_io.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.background_file_io.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(2, 8, 0.1, 0);
-  config.background_file_io.detach_period = base::TimeDelta::FromSeconds(30);
-
-  config.foreground.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.foreground.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.3, 0);
-  config.foreground.detach_period = base::TimeDelta::FromSeconds(30);
-
-  config.foreground_file_io.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.foreground_file_io.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.3, 0);
-  config.foreground_file_io.detach_period = base::TimeDelta::FromSeconds(30);
-  return BrowserWorkerPoolConfigurationToSchedulerWorkerPoolParams(config);
+  return ::task_scheduler_util::GetDefaultBrowserSchedulerWorkerPoolParams();
 }
 #endif  // defined(OS_IOS)
 
 }  // namespace initialization
 }  // namespace task_scheduler_util