DevTools: Font changes when "Edit as HTML" is selected
DevTools: Font changes when "Edit as HTML" is selected

Unify the CodeMirror-related DOM structure across CodeMirror usages:
the CodeMirror.display.wrapper element should have the "source-map" class.

BUG=235815
R=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/13868023

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@149336 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs