Initialize TaskScheduler in renderers.

content/public/renderer/content_renderer_client.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
+#include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "content/public/common/content_client.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "third_party/WebKit/public/web/WebNavigationPolicy.h"
 #include "third_party/WebKit/public/web/WebNavigationType.h"
 #include "ui/base/page_transition_types.h"
 #include "v8/include/v8.h"
 
 class GURL;
 class SkBitmap;
 
 namespace base {
 class FilePath;
+class SchedulerWorkerPoolParams;
 class SingleThreadTaskRunner;
+class TaskTraits;
 }
 
 namespace blink {
 class WebAudioDevice;
 class WebClipboard;
 class WebFrame;
 class WebLocalFrame;
 class WebMIDIAccessor;
 class WebMIDIAccessorClient;
 class WebMediaStreamCenter;
@@ skipping 87 matching lines @@
   // and the embedder's GetNavigationErrorHtml will be called afterwards to get
   // the error html.
   virtual bool HasErrorPage(int http_status_code,
                             std::string* error_domain);
 
   // Returns true if the embedder prefers not to show an error page for a failed
   // navigation to |url| in |render_frame|.
   virtual bool ShouldSuppressErrorPage(RenderFrame* render_frame,
                                        const GURL& url);
 
+  // Returns true if the renderer should initialize a TaskScheduler. If so,
+  // |worker_pool_params_vector| is filled with parameters describing the worker
+  // pools to create, |worker_pool_index_for_traits_callback| is set to a
+  // callback that returns the index in |worker_pools_params_vector| of the
+  // worker pool in which a task with given traits should run and
+  // |should_redirect_sequenced_worker_pool| indicates whether
+  // SequencedWorkerPools should be redirected to TaskScheduler.
+  virtual bool ShouldInitializeTaskScheduler(
+      std::vector<base::SchedulerWorkerPoolParams>* worker_pool_params_vector,
+      base::Callback<size_t(const base::TaskTraits& traits)>*
+          worker_pool_index_for_traits_callback,
+      bool* should_redirect_sequenced_worker_pool);
+
   // Returns the information to display when a navigation error occurs.
   // If |error_html| is not null then it may be set to a HTML page containing
   // the details of the error and maybe links to more info.
   // If |error_description| is not null it may be set to contain a brief
   // message describing the error that has occurred.
   // Either of the out parameters may be not written to in certain cases
   // (lack of information on the error code) so the caller should take care to
   // initialize the string values with safe defaults before the call.
   virtual void GetNavigationErrorStrings(
       content::RenderFrame* render_frame,
@@ skipping 221 matching lines @@
       service_manager::InterfaceRegistry* interface_registry) {}
 
   // Overwrites the given URL to use an HTML5 embed if possible.
   // An empty URL is returned if the URL is not overriden.
   virtual GURL OverrideFlashEmbedWithHTML(const GURL& url);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_