Revert of Specifies transparent background for the label in TileItemView. (patchset #2 id:10002 of https://codereview.chromium.org/655823005/)
Revert of Specifies transparent background for the label in TileItemView. (patchset #2 id:10002 of https://codereview.chromium.org/655823005/)

Reason for revert:
Introduces static initializer, see https://build.chromium.org/p/chromium/builders/Linux%20x64/builds/72389

Original issue's description:
> Specifies transparent background for the label in TileItemView.
>
> We may not use single background when it's in Athena (it's not
> used yet though).
>
> BUG=425717
> R=xiyuan@chromium.org
> TEST=manually
>
> Committed: https://crrev.com/3b74c2c950e3681a94601f61d48a6ff0e25f06f8
> Cr-Commit-Position: refs/heads/master@{#301007}

TBR=xiyuan@chromium.org,mukai@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=425717

Review URL: https://codereview.chromium.org/674083002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#301066}

Fireblend/chromium-crosswalk,fujunwei/chromium-crosswalk,Just-D/chromium-1,Fireblend/chromium-crosswalk,dushu1203/chromium.src,Just-D/chromium-1,M4sse/chromium.src,Fireblend/chromium-crosswalk,Chilledheart/chromium,jaruba/chromium.src,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,Chilledheart/chromium,Just-D/chromium-1,PeterWangIntel/chromium-crosswalk,M4sse/chromium.src,dushu1203/chromium.src,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,dednal/chromium.src,Chilledheart/chromium,krieger-od/nwjs_chromium.src,mohamed--abdel-maksoud/chromium.src,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,jaruba/chromium.src,Just-D/chromium-1,chuan9/chromium-crosswalk,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,chuan9/chromium-crosswalk,Jonekee/chromium.src,axinging/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,markYoungH/chromium.src,chuan9/chromium-crosswalk,jaruba/chromium.src,dednal/chromium.src,hgl888/chromium-crosswalk,Fireblend/chromium-crosswalk,M4sse/chromium.src,Jonekee/chromium.src,Pluto-tv/chromium-crosswalk,markYoungH/chromium.src,TheTypoMaster/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,dushu1203/chromium.src,hgl888/chromium-crosswalk,dednal/chromium.src,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,Just-D/chromium-1,Jonekee/chromium.src,axinging/chromium-crosswalk,fujunwei/chromium-crosswalk,dednal/chromium.src,axinging/chromium-crosswalk,Just-D/chromium-1,markYoungH/chromium.src,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,axinging/chromium-crosswalk,jaruba/chromium.src,ltilve/chromium,krieger-od/nwjs_chromium.src,PeterWangIntel/chromium-crosswalk,axinging/chromium-crosswalk,krieger-od/nwjs_chromium.src,jaruba/chromium.src,jaruba/chromium.src,dednal/chromium.src,markYoungH/chromium.src,ltilve/chromium,chuan9/chromium-crosswalk,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,TheTypoMaster/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Jonekee/chromium.src,jaruba/chromium.src,Pluto-tv/chromium-crosswalk,dushu1203/chromium.src,dushu1203/chromium.src,Jonekee/chromium.src,markYoungH/chromium.src,Fireblend/chromium-crosswalk,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,TheTypoMaster/chromium-crosswalk,axinging/chromium-crosswalk,Chilledheart/chromium,M4sse/chromium.src,ltilve/chromium,fujunwei/chromium-crosswalk,axinging/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,chuan9/chromium-crosswalk,Fireblend/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,Just-D/chromium-1,Jonekee/chromium.src,axinging/chromium-crosswalk,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,fujunwei/chromium-crosswalk,M4sse/chromium.src,dushu1203/chromium.src,Jonekee/chromium.src,Pluto-tv/chromium-crosswalk,dednal/chromium.src,fujunwei/chromium-crosswalk,markYoungH/chromium.src,Fireblend/chromium-crosswalk,fujunwei/chromium-crosswalk,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,ltilve/chromium,TheTypoMaster/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,dednal/chromium.src,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,PeterWangIntel/chromium-crosswalk,chuan9/chromium-crosswalk,dushu1203/chromium.src,Pluto-tv/chromium-crosswalk,dednal/chromium.src,Jonekee/chromium.src,jaruba/chromium.src,dushu1203/chromium.src,Fireblend/chromium-crosswalk,axinging/chromium-crosswalk,M4sse/chromium.src,mohamed--abdel-maksoud/chromium.src,Chilledheart/chromium,Just-D/chromium-1,hgl888/chromium-crosswalk,Chilledheart/chromium,Chilledheart/chromium,dushu1203/chromium.src,ltilve/chromium,krieger-od/nwjs_chromium.src,fujunwei/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Pluto-tv/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,Chilledheart/chromium,dushu1203/chromium.src,ltilve/chromium,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,dednal/chromium.src,fujunwei/chromium-crosswalk,Fireblend/chromium-crosswalk,markYoungH/chromium.src,Chilledheart/chromium,krieger-od/nwjs_chromium.src,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,dednal/chromium.src,chuan9/chromium-crosswalk,ltilve/chromium,mohamed--abdel-maksoud/chromium.src,M4sse/chromium.src,dednal/chromium.src,ltilve/chromium,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,Just-D/chromium-1,dushu1203/chromium.src,markYoungH/chromium.src,jaruba/chromium.src,M4sse/chromium.src,PeterWangIntel/chromium-crosswalk,ltilve/chromium