Revert of Hack around broken snapshot generation in the GN build on Android.

Revert of Hack around broken snapshot generation in the GN build on Android. (patchset #1 id:1 of https://codereview.chromium.org/832413005/)

Reason for revert:
Suspected to block the current v8 roll:
https://codereview.chromium.org/842783003/

Original issue's description:
> Hack around broken snapshot generation in the GN build on Android.
>
> The generated snapshot just crashes on the device, but
> disabling snapshots allows us to run V8 just fine which
> is sufficient for our purposes at this point.
>
> Mojo/Sky are GN-only so we depend on the V8 GN build even if
> it's not considered production for Chromium yet.
>
> R=jochen@chromium.org
>
> Committed: https://crrev.com/3e97df1ee8b8bfdddd63ad3c7b79960d24c83b74
> Cr-Commit-Position: refs/heads/master@{#25982}

TBR=jochen@chromium.org,eseidel@chromium.org
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/7deccd18edadfbe9c15bf9d8615a9e7a25512f9f
Cr-Commit-Position: refs/heads/master@{#25991}

[Michael Achenbach, 2015-01-08 10:43:57]

Created Revert of Hack around broken snapshot generation in the GN build on
Android.

[commit-bot: I haz the power, 2015-01-08 10:45:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/841043002/1

[commit-bot: I haz the power, 2015-01-08 10:45:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-08 10:45:06]

Failed to apply patch for BUILD.gn:
While running git apply --index -3 -p1;
  error: patch failed: BUILD.gn:17
  error: repository lacks the necessary blob to fall back on 3-way merge.
  error: BUILD.gn: patch does not apply

Patch:       BUILD.gn
Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index
403914476116cbdb93fc6c2056b0304b03c772eb..6534eea85948104dffd43635282a3d14f370bc82
100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -17,8 +17,7 @@
 v8_interpreted_regexp = false
 v8_object_print = false
 v8_postmortem_support = false
-# TODO(eseidel): The snapshot generated by the GN Android build crashes.
-v8_use_snapshot = !is_android
+v8_use_snapshot = true
 v8_enable_extra_checks = is_debug
 v8_target_arch = cpu_arch
 v8_random_seed = "314159265"

[Michael Achenbach, 2015-01-08 10:49:16]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-01-08 10:50:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/841043002/1

[commit-bot: I haz the power, 2015-01-08 10:50:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-08 10:50:23]

Patchset 1 (id:??) landed as
https://crrev.com/7deccd18edadfbe9c15bf9d8615a9e7a25512f9f
Cr-Commit-Position: refs/heads/master@{#25991}