GitLab

- Implemented firing property changed event for
  UIA_AriaPropertiesPropertyId and associated unit and
  browser dump tests for the following AriaProperties:
   - disabled
   - level
   - live
   - multiselectable

- Breakdown of UI Automation AriaProperties need to be
  implemented:
  atomic [part 1]
  busy [part 1]
  channel [part 2]
  checked [part 1]
  disabled [part 3, this cl]
  dropeffect [part 2]
  expanded [part 1]
  grabbed [part 2]
  haspopup [part 1]
  hidden [not implemented]
  invalid [part 1]
  level [part 3, this cl]
  live [part 3, this cl]
  multiline [part 1]
  multiselectable [part 3, this cl]
  posinset [part 4]
  pressed [part 4]
  readonly [part 4]
  relevant [part 4]
  required [part 1]
  secret [part 2]
  selected [part 1]
  setsize [part 5]
  sort [part 5]
  tabindex [part 2]
  valuemax [part 5]
  valuemin [part 5]
  valuenow [part 5]
  valuetext [part 5]

- Documentation on UI Automation AriaProperties
(see the second table's last column for AriaProperties
properties):
https://docs.microsoft.com/en-us/windows/desktop/WinAuto/uiauto-ariaspecification

- Link to part 1, UIA: Fire UIA_AriaPropertiesPropertyId event:
  CL:1574834

- Link to part 2, UIA: Fire UIA_AriaPropertiesPropertyId event:
  CL:1576280

- Link to part 3, UIA: Fire UIA_AriaPropertiesPropertyId event:
  CL:1589100

- Link to part 4, UIA: Fire UIA_AriaPropertiesPropertyId event:
  CL:1592640

- Link to part 5, UIA: Fire UIA_AriaPropertiesPropertyId event:
  CL:1591487

Bug: 928949

Change-Id: If2dff6ee3c40a6a4d5e7bec0b298e599b529f878
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1589100
Commit-Queue: Victor Fei <vicfei@microsoft.com>
Reviewed-by: Katie Dektar <katie@chromium.org>
Reviewed-by: Ian Prest <iapres@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#658735}