Reland of moving duplicate functions and symbol names in core/css (patchset #1 id:1 of https://codereview.chromium.org/2801683005/ )

Reason for revert:
The revert did not fix the failing bot, so relanding.

Original issue's description:
> Revert of Removing duplicate functions and symbol names in core/css (patchset #2 id:20001 of https://codereview.chromium.org/2797973002/ )
>
> Reason for revert:
> This is a speculative revert to determine if this is causing a WebRTC Chrome bot to fail.
>
> See
> https://build.chromium.org/p/chromium.webrtc.fyi/builders/Android%20Tests%20%28dbg%29%20%28L%20Nexus6%29/builds/14774
>
> If the revert does not fix the bot, I will reland.
>
> Original issue's description:
> > Removing duplicate functions and symbol names in core/css
> >
> > In the unity build experiment I encountered a few colliding duplicate
> > symbol names in core/css and this patch removes them by replacing
> > duplicated symbols with a single code and by doing some symbol
> > renames.
> >
> > Review-Url: https://codereview.chromium.org/2797973002
> > Cr-Commit-Position: refs/heads/master@{#462256}
> > Committed: https://chromium.googlesource.com/chromium/src/+/5fa4cb0d7a1a784fec7991eaeb1a80e43f9156e5
>
> TBR=rune@opera.com,bratell@opera.com
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Review-Url: https://codereview.chromium.org/2801683005
> Cr-Commit-Position: refs/heads/master@{#462394}
> Committed: https://chromium.googlesource.com/chromium/src/+/13f391f98453cf27e1f355c27982969a9745eb1b

TBR=rune@opera.com,bratell@opera.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2799093003
Cr-Commit-Position: refs/heads/master@{#462405}
5 files changed