Add test for metrics invalidation on textnode removal

Add test for metrics invalidation on textnode removal

This tests that text metrics (read: collapsing info) are updated as
needed when a text node is removed.

BUG=299497, 594058
Committed: https://crrev.com/46068407adaa86bc96d8fffec53df7a0575cdcc9
Cr-Commit-Position: refs/heads/master@{#386223}

[fs, 2016-04-08 13:25:12]

fs@opera.com changed reviewers:
+ pdr@chromium.org

[fs, 2016-04-08 13:25:13]

To repeat what I wrote in (https://codereview.chromium.org/1865923002):

"It passes with and without this CL, but fails with
https://codereview.chromium.org/1861013003 with the call to
setNeedsTextMetricsUpdate() removed from
LayoutSVGText::subtreeChildWillBeRemoved()."

[pdr., 2016-04-08 21:27:53]

On 2016/04/08 at 13:25:13, fs wrote:
> To repeat what I wrote in (https://codereview.chromium.org/1865923002):
> 
> "It passes with and without this CL, but fails with
https://codereview.chromium.org/1861013003 with the call to
setNeedsTextMetricsUpdate() removed from
LayoutSVGText::subtreeChildWillBeRemoved()."

LGTM

[fs, 2016-04-08 22:07:03]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2016-04-08 22:07:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1872513005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1872513005/1

[commit-bot: I haz the power, 2016-04-08 22:13:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-08 22:15:32]

Description was changed from

==========
Add test for metrics invalidation on textnode removal

This tests that text metrics (read: collapsing info) are updated as
needed when a text node is removed.

BUG=299497, 594058
==========

to

==========
Add test for metrics invalidation on textnode removal

This tests that text metrics (read: collapsing info) are updated as
needed when a text node is removed.

BUG=299497, 594058

Committed: https://crrev.com/46068407adaa86bc96d8fffec53df7a0575cdcc9
Cr-Commit-Position: refs/heads/master@{#386223}
==========

[commit-bot: I haz the power, 2016-04-08 22:15:32]

Patchset 1 (id:??) landed as
https://crrev.com/46068407adaa86bc96d8fffec53df7a0575cdcc9
Cr-Commit-Position: refs/heads/master@{#386223}