Give windows boring bars and use 'us' for microseconds.

NOTREECHECKS=true

BUG=skia:
R=bsalomon@google.com, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/393673006
diff --git a/tools/Stats.h b/tools/Stats.h
index 3f19af2..4fddc9b 100644
--- a/tools/Stats.h
+++ b/tools/Stats.h
@@ -6,7 +6,11 @@
 #include "SkString.h"
 #include "SkTSort.h"
 
-static const char* kBars[] = { "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
+#ifdef SK_BUILD_FOR_WIN
+    static const char* kBars[] = { ".", "o", "O" };
+#else
+    static const char* kBars[] = { "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
+#endif
 
 struct Stats {
     Stats(const double samples[], int n) {