GitLab

Previously RWHV::SetSize(gfx::Size(800, 600)) at the beginning of a web
test didn't work on Mac if the previous test synchronously set renderer
window size (which didn't affect browser window size), because the call
was a no-op due to the early return in the function when it found that
the new size was the same as the old size. This left some inconsistent
state caused by the previous synchronous resize persist until we
changed the window size to another value.

Now to ensure RWHV::SetSize() to reset the previous state, we call it
twice, first with a different value, then with the desired value.

This reduces number of unexpected flaky tests on mac-rel from about 300
to about 180.

Bug: 1011191
Change-Id: I00fe653f5c44639d2a841bb5d4db779be0da6147
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1845479
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704235}