Make shift-reload bypass caches and service workers

Reload type has two variants: RELOAD and RELOAD_BYPASSING_CACHE. PlzNavigate
currently sets net::LOAD_NORMAL to load_flags and false to skip_service_worker
as BeginNavigationParams, so RELOAD_BYPASSING_CACHE doesn't affect those. This
CL tries to change those parameters according to the reload type.

Bug: 906542
Change-Id: Ib2f9f645007966d86a694d54dccbb476ec0fb45d
Reviewed-on: https://chromium-review.googlesource.com/c/1343875Reviewed-by: Camille Lamy <clamy@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609692}

content/browser/frame_host/navigation_request.cc

@@ -302,16 +302,24 @@ std::unique_ptr<NavigationRequest> NavigationRequest::CreateBrowserInitiated(
           : base::Optional<url::Origin>(
                 frame_tree_node->frame_tree()->root()->current_origin());
 
-  std::unique_ptr<NavigationRequest> navigation_request(new NavigationRequest(
-      frame_tree_node, common_params,
-      mojom::BeginNavigationParams::New(
+  auto navigation_params = mojom::BeginNavigationParams::New(
       extra_headers, net::LOAD_NORMAL, false /* skip_service_worker */,
       blink::mojom::RequestContextType::LOCATION,
       blink::WebMixedContentContextType::kBlockable, is_form_submission,
       GURL() /* searchable_form_url */,
       std::string() /* searchable_form_encoding */, initiator,
       GURL() /* client_side_redirect_url */,
-          base::nullopt /* devtools_initiator_info */),
+      base::nullopt /* devtools_initiator_info */);
+
+  // Shift-Reload forces bypassing caches and service workers.
+  if (common_params.navigation_type ==
+      FrameMsg_Navigate_Type::RELOAD_BYPASSING_CACHE) {
+    navigation_params->load_flags |= net::LOAD_BYPASS_CACHE;
+    navigation_params->skip_service_worker = true;
+  }
+
+  std::unique_ptr<NavigationRequest> navigation_request(new NavigationRequest(
+      frame_tree_node, common_params, std::move(navigation_params),
       request_params, browser_initiated, false /* from_begin_navigation */,
       &frame_entry, &entry, std::move(navigation_ui_data), nullptr, nullptr));
   navigation_request->blob_url_loader_factory_ =