Remove ResourceLoader PostTask after reading headers.

content/browser/loader/resource_loader.cc

Index: content/browser/loader/resource_loader.cc
diff --git a/content/browser/loader/resource_loader.cc b/content/browser/loader/resource_loader.cc
index 02d24a8f982b0c4a32de9acb5b9045d74aebdf60..225f88354f053d532e288e28f012ef6014c7e3e3 100644
--- a/content/browser/loader/resource_loader.cc
+++ b/content/browser/loader/resource_loader.cc
@@ -642,9 +642,14 @@ void ResourceLoader::CompleteResponseStarted() {
       FROM_HERE_WITH_EXPLICIT_FUNCTION("475761 OnResponseStarted()"));
 
   read_deferral_start_time_ = base::TimeTicks::Now();
-  ScopedDeferral scoped_deferral(this, DEFERRED_READ);
+  deferred_stage_ = DEFERRED_SYNC;

[Charlie Harrison, 2017/02/02 21:37:38]

Please comment when we can't use scoped deferral.

[mmenke, 2017/02/02 21:41:07]

You're completely right.  Done.

   handler_->OnResponseStarted(response.get(),
                               base::MakeUnique<Controller>(this));
+  if (is_deferred()) {
+    deferred_stage_ = DEFERRED_READ;
+  } else {
+    ReadMore(false);
+  }
 }
 
 void ResourceLoader::ReadMore(bool handle_result_async) {