Show the RenderView/Page before showing RenderWidgets.

RenderWidgets start making compositor frames when shown. If the Page
IPC is delayed then they may start trying to produce BeginMainFrames
on a non-visible Page which is confusing to blink and incorrect.

R=avi@chromium.org

Change-Id: If77b892d7d5a9d7606dff529519e7febf1e4440a
Bug: 908582
Reviewed-on: https://chromium-review.googlesource.com/c/1361937
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614060}
1 file changed