commit 14e3acc30f4da1fe3f601828101af47eff68a828
author thomasanderson <thomasanderson@google.com> Mon Mar 27 23:34:06 2017
committer Commit bot <commit-bot@chromium.org> Mon Mar 27 23:34:06 2017
tree f2e272bac8d312d70caa610cfb7d0ec181c400e3
parent 1eda11562c6f9ab82a9d914c4cf2b9f2b1105257

Gtk3: Use menubar instead of headerbar on version less than 3.10

Headerbars were added in Gtk3.10.  All officially supported Chromium
distros meet this requirement, but this CL adds a check in case there
are any users on odd distros without Gtk3.10.  Specifically, a menubar
is used instead of a headerbar in this case.

In addition, this CL also changes the interface of several functions
in gtk_util to use std::string instead of char*, so that I could use
string concatenation in gtk_ui.cc.

BUG=79722
R=erg@chromium.org

Review-Url: https://codereview.chromium.org/2783433002
Cr-Commit-Position: refs/heads/master@{#459934}