In the past few months, the upstream chromium project has started using recent C++ features that are not supported by the trusty (14.04) toolchain.
Until now we managed to work around the issue and build the latest releases on trusty by reverting selected commits, but this has become very difficult as the adoption of new C++ features upstream starts spreading all over the codebase (not to mention that reverting those commits might introduce subtle bugs).
This post is to officially announce that no more security updates will be published for chromium-browser on trusty. The last version available is 65.0.3325.181-0ubuntu0.14.04.1.
People who require an up-to-date version of chromium are encouraged to upgrade to a newer version of Ubuntu (16.04 or 18.04), or install the chromium snap (which in my limited testing works well on trusty):
snap install chromium
All other supported Ubuntu releases (16.04, 17.10, 18.04) will continue receiving chromium updates.
We are working on making the snap package the one and only officially supported way of always running an up-to-date chromium, more on this in a separate thread.