Put more VLOGs to investigate beacon behaviors on shutdown

Bug: 1161996
Change-Id: Iedc79e57787ef9e9c300bd8b9696353a28ba138e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643892Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846145}

content/browser/renderer_host/render_view_host_impl.cc

@@ -635,6 +635,10 @@ void RenderViewHostImpl::DispatchRenderViewCreated() {
 }
 
 void RenderViewHostImpl::ClosePage() {
+  // TODO(crbug.com/1161996): Remove this VLOG once the investigation is done.
+  VLOG(1) << "RenderViewHostImpl::ClosePage() IsRenderViewLive() = "
+          << IsRenderViewLive()
+          << ", SuddenTerminationAllowed() = " << SuddenTerminationAllowed();
   is_waiting_for_page_close_completion_ = true;
 
   if (IsRenderViewLive() && !SuddenTerminationAllowed()) {

third_party/blink/renderer/core/dom/document.cc

@@ -4042,6 +4042,9 @@ bool Document::DispatchBeforeUnloadEvent(ChromeClient* chrome_client,
 void Document::DispatchUnloadEvents(
     SecurityOrigin* committing_origin,
     base::Optional<Document::UnloadEventTiming>* unload_timing) {
+  // TODO(crbug.com/1161996): Remove this VLOG once the investigation is done.
+  VLOG(1) << "Document::DispatchUnloadEvents() URL = " << Url();
+
   PluginScriptForbiddenScope forbid_plugin_destructor_scripting;
   PageDismissalScope in_page_dismissal;
   if (parser_)
@@ -4117,6 +4120,9 @@ void Document::DispatchUnloadEvents(
 
   GetFrame()->Loader().SaveScrollAnchor();
 
+  // TODO(crbug.com/1161996): Remove this VLOG once the investigation is done.
+  VLOG(1) << "Actually dispatching an UnloadEvent: URL = " << Url();
+
   load_event_progress_ = kUnloadEventInProgress;
   Event& unload_event = *Event::Create(event_type_names::kUnload);
   const base::TimeTicks unload_event_start = base::TimeTicks::Now();

third_party/blink/renderer/core/frame/local_frame.cc

@@ -2636,6 +2636,9 @@ void LocalFrame::ClosePage(
     mojom::blink::LocalMainFrame::ClosePageCallback completion_callback) {
   SECURITY_CHECK(IsMainFrame());
 
+  // TODO(crbug.com/1161996): Remove this VLOG once the investigation is done.
+  VLOG(1) << "LocalFrame::ClosePage() URL = " << GetDocument()->Url();
+
   // There are two ways to close a page:
   //
   // 1/ Via webview()->Close() that currently sets the WebView's delegate_ to

third_party/blink/renderer/modules/beacon/navigator_beacon.cc

@@ -80,9 +80,16 @@ bool NavigatorBeacon::SendBeaconImpl(
     ExceptionState& exception_state) {
   ExecutionContext* context = ExecutionContext::From(script_state);
   KURL url = context->CompleteURL(urlstring);
-  if (!CanSendBeacon(context, url, exception_state))
+  if (!CanSendBeacon(context, url, exception_state)) {
+    // TODO(crbug.com/1161996): Remove this VLOG once the investigation is done.
+    VLOG(1) << "Cannot send a beacon to " << url.ElidedString()
+            << ", initiator = " << context->Url();
     return false;
+  }
 
+  // TODO(crbug.com/1161996): Remove this VLOG once the investigation is done.
+  VLOG(1) << "Send a beacon to " << url.ElidedString()
+          << ", initiator = " << context->Url();
   bool allowed;
 
   LocalFrame* frame = GetSupplementable()->DomWindow()->GetFrame();