Revert of Create native_viewport_service, don't build it into mojo_shell unless Android

Revert of Create native_viewport_service, don't build it into mojo_shell unless Android (patchset #16 id:300001 of https://codereview.chromium.org/477923004/)

Reason for revert:
Broke Linux GN bot.

http://build.chromium.org/p/chromium.linux/builders/Linux%20GN%20%28dbg%29/builds/12251

Original issue's description:
> Create native_viewport_service, don't build it into mojo_shell unless Android
> 
> BUG=
> 
> Committed: https://crrev.com/80931e51c8085d8bd44077dc1cd96bc74794e609
> Cr-Commit-Position: refs/heads/master@{#294780}

TBR=darin@chromium.org,ben@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=

[DaveMoore, 2014-09-15 04:32:44]

Created Revert of Create native_viewport_service, don't build it into mojo_shell
unless Android

[commit-bot: I haz the power, 2014-09-15 04:33:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/554163003/1

[commit-bot: I haz the power, 2014-09-15 04:33:42]

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

[commit-bot: I haz the power, 2014-09-15 04:33:42]

Failed to apply patch for mojo/aura/aura_init.cc:
While running git apply --index -p1;
  error: patch failed: mojo/aura/aura_init.cc:11
  error: mojo/aura/aura_init.cc: patch does not apply

Patch:       mojo/aura/aura_init.cc
Index: mojo/aura/aura_init.cc
diff --git a/mojo/aura/aura_init.cc b/mojo/aura/aura_init.cc
index
df17ab77b66ecc0546f65b9116f6ac0abc267d03..a99ce25fc3a88d448d76ea32b785c7fcb275bb95
100644
--- a/mojo/aura/aura_init.cc
+++ b/mojo/aura/aura_init.cc
@@ -11,7 +11,7 @@
 namespace mojo {
 
 AuraInit::AuraInit() {
-  aura::Env::CreateInstance(false);
+  aura::Env::CreateInstance(true);
 
   context_factory_.reset(new ContextFactoryMojo);
   aura::Env::GetInstance()->set_context_factory(context_factory_.get());