Keep disabled FetchLaterAPI: fix net::ERR_TIMED_OUT (#2308)

also activates the API but denies the actual sending of the request

build/patches/Keep-disabled-FetchLaterAPI.patch

@@ -13,10 +13,10 @@ License: GPL-2.0-or-later - https://spdx.org/licenses/GPL-2.0-or-later.html
  .../browser/loader/keep_alive_url_loader.h    |  3 --
  .../Keep-disabled-FetchLaterAPI.inc           |  2 ++
  .../renderer/core/fetch/fetch_manager.cc      | 21 ++++++++++--
- .../loader/child_url_loader_factory_bundle.cc | 14 ++++----
+ .../loader/child_url_loader_factory_bundle.cc | 16 +++++----
  .../platform/loader/fetch/resource_fetcher.cc |  2 +-
  .../platform/runtime_enabled_features.json5   |  4 +--
- 7 files changed, 63 insertions(+), 16 deletions(-)
+ 7 files changed, 65 insertions(+), 16 deletions(-)
  create mode 100644 cromite_flags/third_party/blink/common/features_cc/Keep-disabled-FetchLaterAPI.inc
 
 diff --git a/content/browser/loader/keep_alive_url_loader.cc b/content/browser/loader/keep_alive_url_loader.cc
@@ -146,20 +146,22 @@ diff --git a/third_party/blink/renderer/core/fetch/fetch_manager.cc b/third_part
 diff --git a/third_party/blink/renderer/platform/loader/child_url_loader_factory_bundle.cc b/third_party/blink/renderer/platform/loader/child_url_loader_factory_bundle.cc
 --- a/third_party/blink/renderer/platform/loader/child_url_loader_factory_bundle.cc
 +++ b/third_party/blink/renderer/platform/loader/child_url_loader_factory_bundle.cc
-@@ -250,6 +250,12 @@ void ChildURLLoaderFactoryBundle::CreateLoaderAndStart(
+@@ -250,6 +250,14 @@ void ChildURLLoaderFactoryBundle::CreateLoaderAndStart(
      return;
    }
  
 +  bool keepalive = request.keepalive;
-+  if (keepalive && !request.is_fetch_later_api &&
-+        url::IsSameOriginWith(request.url, request.referrer)) {
-+    keepalive = false;
++  if (keepalive && !request.is_fetch_later_api) {
++    if (request.request_initiator && request.request_initiator->IsSameOriginWith(request.url))
++      keepalive = false;
++    else if (url::IsSameOriginWith(request.url, request.referrer))
++      keepalive = false;
 +  }
 +
    // Use |keep_alive_loader_factory_| to send the keepalive requests to the
    // KeepAliveURLLoaderService in the browser process and trigger the special
    // keepalive request handling.
-@@ -258,12 +264,8 @@ void ChildURLLoaderFactoryBundle::CreateLoaderAndStart(
+@@ -258,12 +266,8 @@ void ChildURLLoaderFactoryBundle::CreateLoaderAndStart(
    if (request.keepalive) {
      FetchUtils::LogFetchKeepAliveRequestSentToServiceMetric(request);
    }
@@ -195,8 +197,8 @@ diff --git a/third_party/blink/renderer/platform/runtime_enabled_features.json5
        // https://chromestatus.com/feature/4654499737632768
 -      name: "FetchLaterAPI",
 -      status: "stable",
-+      name: "FetchLaterAPI",   // disable
-+      status: "experimental",  // by default
++      name: "FetchLaterAPI",   // disabled
++      status: "stable",  // by default (note: idl must be active)
      },
      {
        // The retry ability for Fetch keepalive requests.