Adapt StringBuilder's append and toString methods via StringUtil helper.

Adapt StringBuilder's append and toString methods via StringUtil helper.

This is needed to insulate generated code from blink::protocol namespace
from naming changes that we plan to do in the Great Blink Rename (which
in particular will change wtf::StringBuilder::toString into ToString,
and similarily will rename reserveCapacity and append methods).

BUG=683447
R=dgozman@chromium.org

Committed: https://chromium.googlesource.com/deps/inspector_protocol1a131872167f0f7653629326891aa3ec94417f27

[Łukasz Anforowicz, 2017-01-26 23:01:58]

lukasza@chromium.org changed reviewers:
+ dgozman@chromium.org

[Łukasz Anforowicz, 2017-01-26 23:01:59]

dgozman@, could you PTAL?

Changes in this CL are the same (i.e. I've just copied files around) as in
https://codereview.chromium.org/2660503002 and
https://codereview.chromium.org/2654923002.  Once this CL lands, I'll update
README.chromium / README.v8 in the other CLs and land them.

[dgozman, 2017-01-26 23:08:41]

lgtm

[Łukasz Anforowicz, 2017-01-27 17:02:55]

Description was changed from

==========
Adapt StringBuilder's append and toString methods via StringUtil helper.

This is needed to insulate generated code from blink::protocol namespace
from naming changes that we plan to do in the Great Blink Rename (which
in particular will change wtf::StringBuilder::toString into ToString,
and similarily will rename reserveCapacity and append methods).

BUG=683447
==========

to

==========
Adapt StringBuilder's append and toString methods via StringUtil helper.

This is needed to insulate generated code from blink::protocol namespace
from naming changes that we plan to do in the Great Blink Rename (which
in particular will change wtf::StringBuilder::toString into ToString,
and similarily will rename reserveCapacity and append methods).

BUG=683447
R=dgozman@chromium.org

Committed:
https://chromium.googlesource.com/deps/inspector_protocol1a131872167f0f765362...
==========

[Łukasz Anforowicz, 2017-01-27 17:02:56]

Committed patchset #1 (id:1) manually as
1a131872167f0f7653629326891aa3ec94417f27 (presubmit successful).