Add on-by-default tracing to FrameView::invalidateTree which adds more debug info

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 662767949f2a166c2aef993ef136c06773563473..afc590f368d87a3500a62ee66e0eb6ea6d74cc84 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -1034,8 +1034,7 @@ void FrameView::invalidateTree(RenderObject* root)
     // we continue to track paint invalidation rects until this function is called.
     ASSERT(!m_nestedLayoutCount);
 
-    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("blink.invalidation"), "FrameView::invalidateTree",
-        "root", TRACE_STR_COPY(root->debugName().ascii().data()));
+    TRACE_EVENT1("blink", "FrameView::invalidateTree", "root", TRACE_STR_COPY(root->debugName().ascii().data()));
 
     // FIXME: really, we're in the paint invalidation phase here, and the compositing queries are legal.
     // Until those states are fully fledged, I'll just disable the ASSERTS.