Add subtree field to SetNeedsStyleRecalc tracing.

Whether we mark a node for kLocalStyleChange or kSubtreeStyleChange is
essential information.

Change-Id: I08241b3b319d11d0244bc10f458fb2a47ebf2359
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2033245
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Reviewed-by: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737704}

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

@@ -1416,7 +1416,8 @@ void Node::SetNeedsStyleRecalc(StyleChangeType change_type,
   TRACE_EVENT_INSTANT1(
       TRACE_DISABLED_BY_DEFAULT("devtools.timeline.invalidationTracking"),
       "StyleRecalcInvalidationTracking", TRACE_EVENT_SCOPE_THREAD, "data",
-      inspector_style_recalc_invalidation_tracking_event::Data(this, reason));
+      inspector_style_recalc_invalidation_tracking_event::Data(
+          this, change_type, reason));
 
   StyleChangeType existing_change_type = GetStyleChangeType();
   if (change_type > existing_change_type)

third_party/blink/renderer/core/inspector/inspector_trace_events.cc

@@ -610,6 +610,7 @@ inspector_style_invalidator_invalidate_event::InvalidationList(
 std::unique_ptr<TracedValue>
 inspector_style_recalc_invalidation_tracking_event::Data(
     Node* node,
+    StyleChangeType change_type,
     const StyleChangeReasonForTracing& reason) {
   DCHECK(node);
 
@@ -617,6 +618,7 @@ inspector_style_recalc_invalidation_tracking_event::Data(
   value->SetString("frame",
                    IdentifiersFactory::FrameId(node->GetDocument().GetFrame()));
   SetNodeInfo(value.get(), node, "nodeId", "nodeName");
+  value->SetBoolean("subtree", change_type == kSubtreeStyleChange);
   value->SetString("reason", reason.ReasonString());
   value->SetString("extraData", reason.GetExtraData());
   SourceLocation::Capture()->ToTracedValue(value.get(), "stackTrace");

third_party/blink/renderer/core/inspector/inspector_trace_events.h

@@ -70,6 +70,7 @@ class StyleChangeReasonForTracing;
 class StyleImage;
 class XMLHttpRequest;
 enum class ResourceType : uint8_t;
+enum StyleChangeType : uint32_t;
 
 namespace probe {
 class CallFunction;
@@ -169,7 +170,9 @@ std::unique_ptr<TracedValue> RuleSetInvalidation(ContainerNode&,
           (element), (invalidationSet), ##__VA_ARGS__));
 
 namespace inspector_style_recalc_invalidation_tracking_event {
-std::unique_ptr<TracedValue> Data(Node*, const StyleChangeReasonForTracing&);
+std::unique_ptr<TracedValue> Data(Node*,
+                                  StyleChangeType,
+                                  const StyleChangeReasonForTracing&);
 }
 
 String DescendantInvalidationSetToIdString(const InvalidationSet&);