Trace LayoutObject src attributes and parent frames

content/renderer/frame_blame_context.cc

Index: content/renderer/frame_blame_context.cc
diff --git a/content/renderer/frame_blame_context.cc b/content/renderer/frame_blame_context.cc
index 74ed6ee2b256f6318586fc8577b3fd54eba0761b..06407b20081f0a8dd91458786706444e56194d8a 100644
--- a/content/renderer/frame_blame_context.cc
+++ b/content/renderer/frame_blame_context.cc
@@ -4,6 +4,7 @@
 
 #include "content/renderer/frame_blame_context.h"
 
+#include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/top_level_blame_context.h"
@@ -34,8 +35,17 @@ FrameBlameContext::FrameBlameContext(RenderFrameImpl* render_frame,
                                       kFrameBlameContextType,
                                       kFrameBlameContextScope,
                                       render_frame->GetRoutingID(),
-                                      GetParentBlameContext(parent_frame)) {}
+                                      GetParentBlameContext(parent_frame)),
+      frame_(render_frame) {
+}
 
 FrameBlameContext::~FrameBlameContext() {}
 
+void FrameBlameContext::AsValueInto(base::trace_event::TracedValue* value) {
+  value->BeginDictionary("LayoutTree");
+  value->SetString("scope", "LayoutTree");
+  value->SetString("id_ref", base::StringPrintf("%p", frame_->GetWebFrame()));
+  value->EndDictionary();
+}
+
 }  // namespace content