Be explicit about the testing namespace because there are two

There is both a ::testing and ::blink::testing namespace and if
you refer to just "testing" inside the ::blink namespace you can
get either one depending on what the compiler knows.

This broke jumbo builds where the compiler knew about
::blink::testing and thought "testing" meant ::blink::testing
instead of ::testing.

The fix is to use the :: prefix.

Change-Id: I15b2502a5b15ef585816faae843a97b3d2d73c93
Reviewed-on: https://chromium-review.googlesource.com/813775
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#522401}
1 file changed