Do not restrict the visibility of webkit_unit_tests to only third_party/WebKit.

Do not restrict the visibility of webkit_unit_tests to only third_party/WebKit.

We need to access this unit test target from Chromium, hence we need to
make it accessibile outside of Blink.

The error is as follow:

ERROR at //BUILD.gn:723:3: Dependency not allowed.
  group("blink_tests") {
            ^---------------------
The item //:blink_tests can not depend on //third_party/WebKit/Source/web:webkit_unit_tests
because it is not in //third_party/WebKit/Source/web:webkit_unit_tests's
  //visibility list: [
    //third_party/WebKit/*
  ]

BUG=483171
TEST=gn gen out-gn/Debug
R=dpranke@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=195024

[Dirk Pranke, 2015-05-07 01:38:44]

lgtm

[tfarina, 2015-05-07 02:43:51]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-05-07 02:44:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1131763003/1

[commit-bot: I haz the power, 2015-05-07 04:37:24]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=195024