Control TaskScheduler initialization params in renderers via field trial.

chrome/renderer/chrome_content_renderer_client.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/renderer/chrome_content_renderer_client.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 61 matching lines @@
 #include "components/dom_distiller/core/url_constants.h"
 #include "components/error_page/common/localized_error.h"
 #include "components/network_hints/renderer/prescient_networking_dispatcher.h"
 #include "components/password_manager/content/renderer/credential_manager_client.h"
 #include "components/pdf/renderer/pepper_pdf_host.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "components/spellcheck/spellcheck_build_features.h"
 #include "components/startup_metric_utils/common/startup_metric.mojom.h"
 #include "components/subresource_filter/content/renderer/ruleset_dealer.h"
 #include "components/subresource_filter/content/renderer/subresource_filter_agent.h"
+#include "components/task_scheduler_util/renderer/initialization.h"
 #include "components/version_info/version_info.h"
 #include "components/visitedlink/renderer/visitedlink_slave.h"
 #include "components/web_cache/renderer/web_cache_impl.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/renderer/plugin_instance_throttler.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
@@ skipping 1375 matching lines @@
 
   url::Replacements<char> r;
   r.SetPath(path.c_str(), url::Component(0, path.length()));
 
   if (result == internal::NUM_PLUGIN_ERROR)
     result = invalid_url ? internal::SUCCESS_PARAMS_REWRITE : internal::SUCCESS;
 
   RecordYouTubeRewriteUMA(result);
   return corrected_url.ReplaceComponents(r);
 }
+
+void ChromeContentRendererClient::GetTaskSchedulerInitializationParams(
+    std::vector<base::SchedulerWorkerPoolParams>* params_vector,
+    base::TaskScheduler::WorkerPoolIndexForTraitsCallback*
+        index_to_traits_callback) {
+  DCHECK(params_vector);
+  DCHECK(index_to_traits_callback);
+  // If this call fails, content will fall back to the default params.
+  *params_vector = task_scheduler_util::GetRendererWorkerPoolParams();
+  *index_to_traits_callback =
+      base::Bind(&task_scheduler_util::RendererWorkerPoolIndexForTraits);
+}