scheduler: Turn expensive task blocking into a finch trial

content/renderer/renderer_main.cc

Index: content/renderer/renderer_main.cc
diff --git a/content/renderer/renderer_main.cc b/content/renderer/renderer_main.cc
index 1847018babbbd475dea7d20a93991c8095af2784..6c2d8987bf0c73b9ff0b1e539ed20523d5c37283 100644
--- a/content/renderer/renderer_main.cc
+++ b/content/renderer/renderer_main.cc
@@ -154,8 +154,6 @@ int RendererMain(const MainFunctionParams& parameters) {
 #endif
 
   base::PlatformThread::SetName("CrRendererMain");
-  scoped_ptr<scheduler::RendererScheduler> renderer_scheduler(
-      scheduler::RendererScheduler::Create());
 
   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
 
@@ -186,6 +184,9 @@ int RendererMain(const MainFunctionParams& parameters) {
       parsed_command_line.GetSwitchValueASCII(switches::kDisableFeatures));
   base::FeatureList::SetInstance(std::move(feature_list));
 
+  scoped_ptr<scheduler::RendererScheduler> renderer_scheduler(
+      scheduler::RendererScheduler::Create());
+
   // PlatformInitialize uses FieldTrials, so this must happen later.
   platform.PlatformInitialize();