Disable bench that's crashing on ChromeOS/Alex perf bot.

BUG=skia:2589
R=fmalita@chromium.org, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/292203009

git-svn-id: http://skia.googlecode.com/svn/trunk@14843 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/MemcpyBench.cpp b/bench/MemcpyBench.cpp
index 1027ad0..0bb7b61 100644
--- a/bench/MemcpyBench.cpp
+++ b/bench/MemcpyBench.cpp
@@ -142,7 +142,8 @@
         *dst++ = *src++;
     }
 }
-BENCH(memcpy32_sse2_unalign, 10)
+// skia:2589: Crashing on ChromeOS Alex bot.  TODO(mtklein): why?
+//BENCH(memcpy32_sse2_unalign, 10)
 BENCH(memcpy32_sse2_unalign, 100)
 BENCH(memcpy32_sse2_unalign, 1000)
 BENCH(memcpy32_sse2_unalign, 10000)