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

src/core/SkString.cpp

Index: src/core/SkString.cpp
diff --git a/src/core/SkString.cpp b/src/core/SkString.cpp
index e30b89f19947dd667648b13a86a06c32e86bd79c..643dfb13727449247a525eee12b6bfb3ad002088 100644
--- a/src/core/SkString.cpp
+++ b/src/core/SkString.cpp
@@ -634,5 +634,17 @@ SkString SkStringPrintf(const char* format, ...) {
     return formattedOutput;
 }
 
+void SkStrSplit(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);
+    }
+}
+
 #undef VSNPRINTF
 #undef SNPRINTF