Experiment with redirecting all BrowserThreads (but UI/IO) to TaskScheduler

chrome/browser/chrome_content_browser_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 CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 288 matching lines @@
   content::PresentationServiceDelegate* GetPresentationServiceDelegate(
       content::WebContents* web_contents) override;
 
   void RecordURLMetric(const std::string& metric, const GURL& url) override;
   ScopedVector<content::NavigationThrottle> CreateThrottlesForNavigation(
       content::NavigationHandle* handle) override;
   std::unique_ptr<content::NavigationUIData> GetNavigationUIData(
       content::NavigationHandle* navigation_handle) override;
   std::unique_ptr<content::MemoryCoordinatorDelegate>
   GetMemoryCoordinatorDelegate() override;
+  bool RedirectNonUINonIOBrowserThreadsToTaskScheduler() override;
 
  private:
   friend class DisableWebRtcEncryptionFlagTest;
 
 #if defined(ENABLE_WEBRTC)
   // Copies disable WebRTC encryption switch depending on the channel.
   static void MaybeCopyDisableWebRtcEncryptionSwitch(
       base::CommandLine* to_command_line,
       const base::CommandLine& from_command_line,
       version_info::Channel channel);
@@ skipping 33 matching lines @@
   // Vector of additional ChromeContentBrowserClientParts.
   // Parts are deleted in the reverse order they are added.
   std::vector<ChromeContentBrowserClientParts*> extra_parts_;
 
   base::WeakPtrFactory<ChromeContentBrowserClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClient);
 };
 
 #endif  // CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_