Fixes lower/upper typo.

BUG=skia:
R=robertphillips@google.com
TBR=robertphillips@google.com
NOTRY=true

Author: bensong@google.com

Review URL: https://codereview.chromium.org/266023005

git-svn-id: http://skia.googlecode.com/svn/trunk@14556 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/gen_bench_expectations.py b/bench/gen_bench_expectations.py
index 6a5ee1e..4b01f24 100644
--- a/bench/gen_bench_expectations.py
+++ b/bench/gen_bench_expectations.py
@@ -44,8 +44,8 @@
   diff = maximum - minimum
   avg = sum(benches) / len(benches)
 
-  return [minimum - diff * RANGE_RATIO_LOWER - avg * ERR_RATIO - ERR_UB,
-          maximum + diff * RANGE_RATIO_UPPER + avg * ERR_RATIO + ERR_LB]
+  return [minimum - diff * RANGE_RATIO_LOWER - avg * ERR_RATIO - ERR_LB,
+          maximum + diff * RANGE_RATIO_UPPER + avg * ERR_RATIO + ERR_UB]
 
 
 def create_expectations_dict(revision_data_points):