commit b82a8a7a80fa77005f996f93f60e4f32c8882651
author tkent <tkent@chromium.org> Sat May 07 03:17:59 2016
committer Commit bot <commit-bot@chromium.org> Sat May 07 03:20:05 2016
tree f9f17540f8a5e8a4d81dddd1e3f218406f043b54
parent bc40cd2fa23157318f175b5ba9e59e6917c8b2a5

Do not open SELECT popup if the SELECT element is not in the viewport.

New behavior is compatible with IE and Firefox.
The main parts of this CL are:
  - HTMLSelectElement.cpp, and
  - menulist-popup-outside-viewport.html
Changes in other files are just adjustment for the new behavior.
  - ExternalPopupMenuTest.cpp: The viewport size was too small.
  - popup-menu-key-operations.html: PASS messages moved out a SELECT element
  - popup-menu-position.html: Anchor rectangle is clipped.

BUG=90515, 565760

Review-Url: https://codereview.chromium.org/1959583002
Cr-Commit-Position: refs/heads/master@{#392240}