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

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 1016 matching lines @@
 // let the compositor pick which to actually draw.
 // See http://crbug.com/306706
 void FrameView::invalidateTree(RenderObject* root)
 {
     ASSERT(RuntimeEnabledFeatures::repaintAfterLayoutEnabled());
     ASSERT(!root->needsLayout());
     // We should only invalidate paints for the outer most layout. This works as
     // 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.
     DisableCompositingQueryAsserts compositingQueryAssertsDisabler;
 
     RootLayoutStateScope rootLayoutStateScope(*root);
 
     root->invalidateTreeAfterLayout(*root->containerForRepaint());
 
     // Invalidate the paint of the frameviews scrollbars if needed
@@ skipping 2214 matching lines @@
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(scrollbar);
         cache->handleScrollbarUpdate(this);
     }
 }
 
 } // namespace WebCore