DM: write failed comparison mode .pngs one more level deep in the tree.

dm/DM.cpp

Index: dm/DM.cpp
diff --git a/dm/DM.cpp b/dm/DM.cpp
index 8c30fe6b55aebb8f8e0ee72df46be10bbced49ba..274ec2a815eb89f8aa6ab40d478da116f9df9050 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -6,6 +6,7 @@
 #include "SkCommandLineFlags.h"
 #include "SkForceLinking.h"
 #include "SkGraphics.h"
+#include "SkString.h"
 #include "gm.h"
 
 #include "DMReporter.h"
@@ -39,19 +40,6 @@ DEFINE_string(config, "8888 gpu",
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
-// Split str on any characters in delimiters into out.  (Think, strtok with a sane API.)
-static void split(const char* str, const char* delimiters, SkTArray<SkString>* out) {
-    const char* end = str + strlen(str);
-    while (str != end) {
-        // Find a token.
-        const size_t len = strcspn(str, delimiters);
-        out->push_back().set(str, len);
-        str += len;
-        // Skip any delimiters.
-        str += strspn(str, delimiters);
-    }
-}
-
 // "FooBar" -> "foobar".  Obviously, ASCII only.
 static SkString lowercase(SkString s) {
     for (size_t i = 0; i < s.size(); i++) {
@@ -134,7 +122,7 @@ int tool_main(int argc, char** argv) {
     GM::SetResourcePath(FLAGS_resources[0]);
     SkTArray<SkString> configs;
     for (int i = 0; i < FLAGS_config.count(); i++) {
-        split(FLAGS_config[i], ", ", &configs);
+        SkStrSplit(FLAGS_config[i], ", ", &configs);
     }
 
     SkTDArray<GMRegistry::Factory> gms;