[Mojo-Loading] OnStartLoadingResponseBody should be called after OnReceiveResponse

content/child/url_response_body_consumer.cc

Index: content/child/url_response_body_consumer.cc
diff --git a/content/child/url_response_body_consumer.cc b/content/child/url_response_body_consumer.cc
index 5014eeb1ed6eb81443d4ba6642c5827f32e2b912..398ea85b19dd0b8a7abee23d5cd06dd880dfc261 100644
--- a/content/child/url_response_body_consumer.cc
+++ b/content/child/url_response_body_consumer.cc
@@ -47,13 +47,7 @@ URLResponseBodyConsumer::URLResponseBodyConsumer(
       handle_(std::move(handle)),
       handle_watcher_(task_runner),
       task_runner_(task_runner),
-      has_seen_end_of_data_(!handle_.is_valid()) {}
-
-URLResponseBodyConsumer::~URLResponseBodyConsumer() {}
-
-void URLResponseBodyConsumer::Start() {
-  if (has_been_cancelled_)
-    return;
+      has_seen_end_of_data_(!handle_.is_valid()) {
   handle_watcher_.Start(
       handle_.get(), MOJO_HANDLE_SIGNAL_READABLE,
       base::Bind(&URLResponseBodyConsumer::OnReadable, base::Unretained(this)));
@@ -62,6 +56,8 @@ void URLResponseBodyConsumer::Start() {
                             MOJO_RESULT_OK));
 }
 
+URLResponseBodyConsumer::~URLResponseBodyConsumer() {}
+
 void URLResponseBodyConsumer::OnComplete(
     const ResourceRequestCompletionStatus& status) {
   if (has_been_cancelled_)