Skeleton of DM

dm/DMReporter.cpp

+#include "DMReporter.h"
+
+namespace DM {
+
+void Reporter::updateStatusLine() const {
+    SkDebugf("\r\033[K%d / %d, %d failed", this->finished(), this->started(), this->failed());
+}
+
+int32_t Reporter::failed() const {
+    SkAutoMutexAcquire reader(&fMutex);
+    return fFailures.count();
+}
+
+void Reporter::fail(SkString name) {
+    SkAutoMutexAcquire writer(&fMutex);
+    fFailures.push_back(name);
+}
+
+void Reporter::getFailures(SkTArray<SkString>* failures) const {
+    SkAutoMutexAcquire reader(&fMutex);
+    *failures = fFailures;
+}
+
+}  // namespace DM