Chrome for iOS was historically kept separate from Google’s open-source Chromium project. Chrome uses a rendering engine called Blink on every platform except iOS where it must run WebKit. That made incorporating Chrome for iOS into Chromium complicated, but today Google announced that Chrome for iOS has rejoined Chromium and been added to the open-source repository. Now,
developers can compile the iOS version of Chromium like they can for other versions of Chromium. Development speed is also faster now that all of the tests for Chrome for iOS are available to the entire Chromium community and automatically run any time that code is checked in.