Oilpan: avoid ODR warning when linking heap unit tests.

Oilpan: avoid ODR warning when linking heap unit tests.

Do not replace blink::Node in unit tests and risk triggering linker ODR
warnings, but instead define a uniquely named test object and assign it
to the Node typed heap.

R=haraken
BUG=420515, 449754
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=191530

[sof, 2015-03-09 07:35:54]

sigbjornf@opera.com changed reviewers:
+ oilpan-reviews@chromium.org

[sof, 2015-03-09 07:35:55]

please take a look.

[haraken, 2015-03-09 07:37:16]

LGTM

I had the same error and was wondering why :)

[sof, 2015-03-09 07:40:07]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2015-03-09 07:40:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/992603002/1

[sof, 2015-03-09 07:49:41]

On 2015/03/09 07:37:16, haraken wrote:
> LGTM
> 
> I had the same error and was wondering why :)

fyi, the linker warning was enabled yesterday (
https://codereview.chromium.org/988633004 )

[commit-bot: I haz the power, 2015-03-09 09:05:32]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=191530