Moving shaping code to platform/fonts/shaping

Move the two text shaping implementations, HarfBuzzShaper and
SimpleShaper, and their support classes into the new platform/fonts/
shaping directory.

Straight move, the only code changes are updated include directives and
style fixes to make check-webkit-style happy.

R=dglazkov@chromium.org

Review URL: https://codereview.chromium.org/642493002

git-svn-id: svn://svn.chromium.org/blink/trunk@183435 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[ServiceWorker] Add WebDataSource argument to isControlledByServiceWorker() [3/3 blink]

In current implementation, while the new page is loading the request from the existing previous page may refer to the provisional dataSource in isControlledByServiceWorker().
But this is wrong.
We should pass WebDataSource to this method to avoid the ambiguity.

1/3 blink: https://codereview.chromium.org/634813002
2/3 chromium: https://codereview.chromium.org/629953003
3/3 blink: https://codereview.chromium.org/635693003

BUG=411151

Review URL: https://codereview.chromium.org/635693003

git-svn-id: svn://svn.chromium.org/blink/trunk@183436 bbb929c8-8fbe-4397-9dbb-9b2b20218538