XMLTreeViewer::transformDocumentToTreeView should not call styleResolverChanged

transformDocumentToTreeView was calling styleResolverChanged(RecalcStyleImmediately)
after updating the text inside a <style> element. This isn't neccesary since we already
updated the stylesheets inside StyleElement::childrenChanged.

This removed one StyleResolver invalidation and one full document Force recalc when loading
xml files into the viewer.

R=eseidel@chromium.org,ojan@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18284006

git-svn-id: svn://svn.chromium.org/blink/trunk@154176 bbb929c8-8fbe-4397-9dbb-9b2b20218538