add command line flags

BUG=
R=djsollen@google.com

Review URL: https://codereview.chromium.org/17885003

git-svn-id: http://skia.googlecode.com/svn/trunk@9794 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/skpdiff/SkCLImageDiffer.cpp b/experimental/skpdiff/SkCLImageDiffer.cpp
index 4bbb18c..721f4c4 100644
--- a/experimental/skpdiff/SkCLImageDiffer.cpp
+++ b/experimental/skpdiff/SkCLImageDiffer.cpp
@@ -126,7 +126,7 @@
 ////////////////////////////////////////////////////////////////
 
 const char* SkDifferentPixelsImageDiffer::getName() {
-    return "Find Different Pixels";
+    return "different_pixels";
 }
 
 int SkDifferentPixelsImageDiffer::queueDiff(SkBitmap * baseline, SkBitmap * test) {