Reuse existing ValueToString<float> in test

There is a ValueToString<float> in FloatPolygon to be used by
POD tests so PODIntervalTreeTres doesn't need to define its own.

Noticed in a jumbo build where the two copies collided.

Bug: 745732
Change-Id: I7dd3cd6429ac9c1357dad8c7e3cf98140a58f9d3
Reviewed-on: https://chromium-review.googlesource.com/671266
Commit-Queue: Daniel Bratell <bratell@opera.com>
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502598}
1 file changed