skpdiff: remove default value for output. Diifs can be very big, and fill a hard drive, no sense to generate them if not needed.
R=zachr@google.com
Review URL: https://codereview.chromium.org/20054003
git-svn-id: http://skia.googlecode.com/svn/trunk@10291 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/skpdiff/skpdiff_main.cpp b/tools/skpdiff/skpdiff_main.cpp
index 9664f33..f89cc37 100644
--- a/tools/skpdiff/skpdiff_main.cpp
+++ b/tools/skpdiff/skpdiff_main.cpp
@@ -37,7 +37,7 @@
DEFINE_string2(differs, d, "", "The names of the differs to use or all of them by default");
DEFINE_string2(folders, f, "", "Compare two folders with identical subfile names: <baseline folder> <test folder>");
DEFINE_string2(patterns, p, "", "Use two patterns to compare images: <baseline> <test>");
-DEFINE_string2(output, o, "skpdiff_output.json", "Writes the output of these diffs to output: <output>");
+DEFINE_string2(output, o, "", "Writes the output of these diffs to output: <output>");
DEFINE_bool(jsonp, true, "Output JSON with padding");
DEFINE_string(csv, "", "Writes the output of these diffs to a csv file");