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This method allows to replace the content of the page with
given data and MIME type.
The method does not trigger a navigation.

The method also takes a URL that will replace the current
URL in the navigation stack.

Bug: 929492
Change-Id: If1295915718d8dd9e582d2e88035eb63ce7341ea
Reviewed-on: https://chromium-review.googlesource.com/c/1436359
Auto-Submit: Olivier Robin <olivierrobin@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Danyao Wang <danyao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632019}