try nanobench on Windows again

BUG=skia:

Review URL: https://codereview.chromium.org/399813002

slave/skia_slave_scripts/run_nanobench.py

diff --git a/slave/skia_slave_scripts/run_nanobench.py b/slave/skia_slave_scripts/run_nanobench.py
index 10ef84b..111f795 100644
--- a/slave/skia_slave_scripts/run_nanobench.py
+++ b/slave/skia_slave_scripts/run_nanobench.py
@@ -44,10 +44,6 @@
       # Segfaults when run as GPU bench.  Very large texture?
       match.append('~blurroundrect')
 
-    if self._AllMatch('Win', 'Release'):
-      # Appears we're falling into an infinite loop.
-      run_nanobench = False
-
     if self._AnyMatch('Nexus7'):
       # Crashes in GPU mode.
       match.append('~draw_stroke')