Add chart bench.
Review URL: https://codereview.appspot.com/7368051

git-svn-id: http://skia.googlecode.com/svn/trunk@7821 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/bench.gypi b/gyp/bench.gypi
index 6372cf3..a18ace8 100644
--- a/gyp/bench.gypi
+++ b/gyp/bench.gypi
@@ -13,6 +13,7 @@
     '../bench/BlurBench.cpp',
     '../bench/BlurRectBench.cpp',
     '../bench/ChecksumBench.cpp',
+    '../bench/ChartBench.cpp',
     '../bench/ChromeBench.cpp',
     '../bench/DashBench.cpp',
     '../bench/DecodeBench.cpp',