Revert of Avoid LSan false positives from CSSPathValue::emptyValue().

Revert of Avoid LSan false positives from CSSPathValue::emptyValue(). (patchset #1 id:1 of https://codereview.chromium.org/1566423002/ )

Reason for revert:
Broke Cast Android (dbg) build: https://build.chromium.org/p/chromium.linux/builders/Cast%20Android%20(dbg)

Original issue's description:
> Avoid LSan false positives from CSSPathValue::emptyValue().
>
> LSan reports a leak on SVGComputedStyleTest.MiscStyleShouldCompareValue
> (with Oilpan), stemming from emptyValue()'s allocation of an
> SVGPathByteStream object. Introduce a local constructor function that
> explicitly keeps this sub-object from LSan's view -- it is owned by
> the emptyValue singleton and shouldn't be considered a leak.
>
> R=haraken
> BUG=
>
> Committed: https://crrev.com/08494b981bbe6e9925ffd6663e65b6151bdd9425
> Cr-Commit-Position: refs/heads/master@{#368329}

TBR=oilpan-reviews@chromium.org,sigbjornf@opera.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/0c2bd4e98d84974bf5f302f70c16bade6265b5c0
Cr-Commit-Position: refs/heads/master@{#368330}

[Marc Treib, 2016-01-08 14:52:52]

Created Revert of Avoid LSan false positives from CSSPathValue::emptyValue().

[commit-bot: I haz the power, 2016-01-08 14:53:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1570513005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1570513005/1

[commit-bot: I haz the power, 2016-01-08 14:54:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-08 14:55:15]

Description was changed from

==========
Revert of Avoid LSan false positives from CSSPathValue::emptyValue(). (patchset
#1 id:1 of https://codereview.chromium.org/1566423002/ )

Reason for revert:
Broke Cast Android (dbg) build:
https://build.chromium.org/p/chromium.linux/builders/Cast%20Android%20(dbg)

Original issue's description:
> Avoid LSan false positives from CSSPathValue::emptyValue().
> 
> LSan reports a leak on SVGComputedStyleTest.MiscStyleShouldCompareValue
> (with Oilpan), stemming from emptyValue()'s allocation of an
> SVGPathByteStream object. Introduce a local constructor function that
> explicitly keeps this sub-object from LSan's view -- it is owned by
> the emptyValue singleton and shouldn't be considered a leak.
> 
> R=haraken
> BUG=
> 
> Committed: https://crrev.com/08494b981bbe6e9925ffd6663e65b6151bdd9425
> Cr-Commit-Position: refs/heads/master@{#368329}

TBR=oilpan-reviews@chromium.org,sigbjornf@opera.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
==========

to

==========
Revert of Avoid LSan false positives from CSSPathValue::emptyValue(). (patchset
#1 id:1 of https://codereview.chromium.org/1566423002/ )

Reason for revert:
Broke Cast Android (dbg) build:
https://build.chromium.org/p/chromium.linux/builders/Cast%20Android%20(dbg)

Original issue's description:
> Avoid LSan false positives from CSSPathValue::emptyValue().
>
> LSan reports a leak on SVGComputedStyleTest.MiscStyleShouldCompareValue
> (with Oilpan), stemming from emptyValue()'s allocation of an
> SVGPathByteStream object. Introduce a local constructor function that
> explicitly keeps this sub-object from LSan's view -- it is owned by
> the emptyValue singleton and shouldn't be considered a leak.
>
> R=haraken
> BUG=
>
> Committed: https://crrev.com/08494b981bbe6e9925ffd6663e65b6151bdd9425
> Cr-Commit-Position: refs/heads/master@{#368329}

TBR=oilpan-reviews@chromium.org,sigbjornf@opera.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/0c2bd4e98d84974bf5f302f70c16bade6265b5c0
Cr-Commit-Position: refs/heads/master@{#368330}
==========

[commit-bot: I haz the power, 2016-01-08 14:55:15]

Patchset 1 (id:??) landed as
https://crrev.com/0c2bd4e98d84974bf5f302f70c16bade6265b5c0
Cr-Commit-Position: refs/heads/master@{#368330}

[sof, 2016-01-08 14:56:11]

lgtm, thanks for the revert. r368320 changed SVGPathByteStream to be
ref-counted.