It is also broken on the new OOBE as well in M56. Let me know if you want me to file a separate issue for that

Issue still seen on 58.0.3029.31

 Issue 692741  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c7c9e55f9f13ae947e938b8a4c929fefdeffe397

commit c7c9e55f9f13ae947e938b8a4c929fefdeffe397
Author: dmazzoni <dmazzoni@chromium.org>
Date: Wed Mar 29 16:21:49 2017

Fix computation of Automation API location offsets in WebViews.

The user-visible error here was that when ChromeVox was enabled,
the orange highlight around an object was sometimes wrong when inside
a <webview>, like in the new OOBE.

Previously, to get the global bounds of an object, we'd figure out the
global bounds relative to the top frame, then use a location offset to
convert from frame-relative coordinates to global screen coordinates.

This wasn't correct for WebViews, because a WebView has its own frame tree
and its own location offset, so the location offset was essentially being
counted twice.

It turns out that now that  http://crbug.com/618120  is fixed, we don't need
the location offset. Instead we should just walk up from any node all the
way to the desktop root node, applying offsets and transforms as we go.
That way there's a single consistent way to compute global bounding boxes
that's the same everywhere, with no special cases for webview. This required
a small fix to GetParent() to search the desktop tree if an explicit parent
tree ID wasn't found.

Includes a new location test with a WebView.

BUG= 658947 , 618120 

Review-Url: https://codereview.chromium.org/2762373002
Cr-Commit-Position: refs/heads/master@{#460412}

[modify] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/browser/extensions/api/automation/automation_apitest.cc
[modify] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
[modify] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/common/extensions/chrome_extension_messages.h
[modify] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/renderer/extensions/automation_internal_custom_bindings.cc
[modify] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/renderer/extensions/automation_internal_custom_bindings.h
[add] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/test/data/extensions/api_test/automation/tests/webview/location_in_webview.js
[add] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/test/data/extensions/api_test/automation/tests/webview/manifest.json
[add] https://crrev.com/c7c9e55f9f13ae947e938b8a4c929fefdeffe397/chrome/test/data/extensions/api_test/automation/tests/webview/webview_frame.html

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e9713fc0690986ce27fb417f01fd715016fbaa46

commit e9713fc0690986ce27fb417f01fd715016fbaa46
Author: Dominic Mazzoni <dmazzoni@chromium.org>
Date: Mon May 08 21:03:02 2017

Merge to M59: Revert "Fix computation of Automation API location offsets in WebViews."

This reverts commit c7c9e55f9f13ae947e938b8a4c929fefdeffe397.

Originally landed: r460412: https://codereview.chromium.org/2762373002

BUG= 717684 , 658947 

Review-Url: https://codereview.chromium.org/2867103005 .
Cr-Commit-Position: refs/branch-heads/3071@{#462}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}

[modify] https://crrev.com/e9713fc0690986ce27fb417f01fd715016fbaa46/chrome/browser/extensions/api/automation/automation_apitest.cc
[modify] https://crrev.com/e9713fc0690986ce27fb417f01fd715016fbaa46/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
[modify] https://crrev.com/e9713fc0690986ce27fb417f01fd715016fbaa46/chrome/common/extensions/chrome_extension_messages.h
[modify] https://crrev.com/e9713fc0690986ce27fb417f01fd715016fbaa46/chrome/renderer/extensions/automation_internal_custom_bindings.cc
[modify] https://crrev.com/e9713fc0690986ce27fb417f01fd715016fbaa46/chrome/renderer/extensions/automation_internal_custom_bindings.h
[delete] https://crrev.com/8a4fb425dc1e081b5942975f0d1c852aae2819e6/chrome/test/data/extensions/api_test/automation/tests/webview/location_in_webview.js
[delete] https://crrev.com/8a4fb425dc1e081b5942975f0d1c852aae2819e6/chrome/test/data/extensions/api_test/automation/tests/webview/manifest.json
[delete] https://crrev.com/8a4fb425dc1e081b5942975f0d1c852aae2819e6/chrome/test/data/extensions/api_test/automation/tests/webview/webview_frame.html

 Issue 722888  has been merged into this issue.