Revert of Reland Switch Chrome Android using v8 arch specific external data name

Revert of Reland Switch Chrome Android using v8 arch specific external data name (patchset #3 id:40001 of https://codereview.chromium.org/1417753004/ )

Reason for revert:
broke gpu bots: https://build.chromium.org/p/chromium.gpu/builders/Android%20Debug%20%28Nexus%206%29/builds/3712

Original issue's description:
> Orignal patch
> https://codereview.chromium.org/1400953002/
>
> Switch Chrome Android using v8 arch specific external data name
>
> For 32-bit, natives_blob_32.bin and snapshot_blob_32.bin are used.
> For 64-bit, natives_blob_64.bin and natives_blob_64.bin are used.
>
> This patch also removed the existing v8 startup data in
> destination directory by using copy_ex to remove directory
> first.
>
> BUG=540788
> TBR=jochen@chromium.org,dpranke@chromium.org,halliwell@chromium.org,jbudorick@chromium.org,mef@chromium.org,rmcilroy@chromium.org,dtrainor@chromium.org,cpu@chromium.org
>
> Committed: https://crrev.com/ed31140dee44c06e6398e92e1afb9c047c9137e6
> Cr-Commit-Position: refs/heads/master@{#355843}

TBR=michaelbai@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=540788
Committed: https://crrev.com/77a03f6624a369d01b565b46e3584d25ae41fb0b
Cr-Commit-Position: refs/heads/master@{#355877}

[jbudorick, 2015-10-23 20:51:31]

Created Revert of Reland Switch Chrome Android using v8 arch specific external
data name

[commit-bot: I haz the power, 2015-10-23 20:52:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1421893002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1421893002/1

[commit-bot: I haz the power, 2015-10-23 20:54:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-23 20:56:34]

Patchset 1 (id:??) landed as
https://crrev.com/77a03f6624a369d01b565b46e3584d25ae41fb0b
Cr-Commit-Position: refs/heads/master@{#355877}