Merge 35668 - Fix doc styling bug where underscores are invisible in some hig...

Merge 35668 - Fix doc styling bug where underscores are invisible in some highlighted code.


On Windows or Linux (but not Mac), if you view the doc page at:

http://code.google.com/chrome/extensions/browserAction.html

You'll notice that in the manifest section, the highlighted code has
underscores missing for "browser_action", "default_icon", "default_title",
etc. If you increase/decrease the font size using CTL + or CTL , the
underscores become visible.

This CL fixes that.

BUG=none
TEST=Should see underscores in highlighted code in extensions doc pre sections
on Win/Linux.


Review URL: http://codereview.chromium.org/521042

TBR=asargent@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=35672