GitLab

Introduce ComputeVisibleExtent() in SelectionModifier

Currently we have  many calls to function
CreateVisiblePosition(selection_.Extent(), selection_.Affinity())
in SelectionModifier. So to reduce the source code
introduced ComputeVisibleExtent() in SelectionModifier.cpp

BUG=749380

Change-Id: I31521e1d4956817131719b30f3dede21fe0221ba
Reviewed-on: https://chromium-review.googlesource.com/591727Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491247}