Get SkV8Example running again.

Doing the "using namespace" penance by adding in v8:: everywhere, like I should have to begin with.

Also:
  - SkWindow now has createSurface, not createCanvas.
  - Add the platform init code v8 now seems to require.
  - Fix library linkage.
  - Call isolate->Enter(); because it doesn't look 
    like v8 starts with a default isolate to begin with.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/e22f45fd89ef70b2ba645c354e951365ab8540c7

[jcgregorio, 2014-10-24 17:52:55]

jcgregorio@google.com changed reviewers:
+ robertphillips@google.com

[robertphillips, 2014-10-24 18:43:00]

lgtm

[robertphillips, 2014-10-24 18:43:05]

The CQ bit was checked by robertphillips@google.com

[commit-bot: I haz the power, 2014-10-24 18:44:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/673223002/80001

[commit-bot: I haz the power, 2014-10-24 19:49:31]

Committed patchset #5 (id:80001) as e22f45fd89ef70b2ba645c354e951365ab8540c7