GitLab

This reverts commit 6a308947.

Reason for revert: Caused https://crbug.com/chromedriver/2615

Original change's description:
> [ChromeDriver] Do not return stale window handle
>
> Move ExecuteGetCurrentWindowHandle() from session_commands.cc
> to window_commands.cc, to make use of automatic window state
> validation done for window commands.
>
> Bug: chromedriver:1404
> Change-Id: Id5ac4c7cea5323f12612b2dfb4dff2b819ce22ff
> Reviewed-on: https://chromium-review.googlesource.com/1257362
> Reviewed-by: John Chen <johnchen@chromium.org>
> Commit-Queue: Tatiana Buldina <buldina@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#595938}

TBR=johnchen@chromium.org,buldina@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromedriver:1404 chromedriver:2615
Change-Id: I7b8605d8f83536e0ebcdae4fe8f628fe1de80d1b
Reviewed-on: https://chromium-review.googlesource.com/c/1289069Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600857}