Use TaskScheduler::InitParams to initialize TaskScheduler in browser process.

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index f03f5ff9706e1993d0b15ef02554ec412dcae9fa..bf8f8fb2c4ae6324ddd9a8db1e5077c7da9d6f7e 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -448,6 +448,11 @@ ContentBrowserClient::GetMemoryCoordinatorDelegate() {
   return nullptr;
 }
 
+std::unique_ptr<base::TaskScheduler::InitParams>
+ContentBrowserClient::GetTaskSchedulerInitParams() {
+  return nullptr;
+}
+
 bool ContentBrowserClient::ShouldRedirectDOMStorageTaskRunner() {
   return false;
 }