Sort project headers in a case-sensitive way since PRESUBMIT enforces that

Sort project headers in a case-sensitive way since PRESUBMIT enforces that

The PRESUBMIT check requires that the lines:

#include "third_party/WebKit/...h"
#include "third_party/skia/...h"

be sorted in that order, which requires doing a case-sensitive sort. sort-headers.py was
changed to do a case-insensitive sort in r139294 to avoid shuffling system header includes
like these:

#include <uxtheme.h>
#include <Vssym32.h>

This preserves that behavior only for system-style includes (those with <>).

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=187945

[Nico, 2013-03-13 21:13:04]

lgtm

[jamesr, 2013-03-13 21:24:43]

Committed patchset #1 manually as r187945 (presubmit successful).