GitLab

Initialize printing on Android the same way as other platforms, instead
of in TabAndroid::Print(). By calling printing::InitializePrinting()
like other platforms, the PDF compositor will be created as needs.

Also implement PrintCrossProcessSubframe() in
TabWebContentsDelegateAndroid to redirect the subframe print request,
since the Browser class does not exist on Android.

BUG=890417

Change-Id: I7195cf2afe2560dd56a56b5a769acf9e51bbb41b
Reviewed-on: https://chromium-review.googlesource.com/c/1420302
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Wei Li <weili@chromium.org>
Reviewed-by: Shimi Zhang <ctzsm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625362}