Revert of Sketch DM refactor.

dm/DMReporter.h

+#ifndef DMReporter_DEFINED
+#define DMReporter_DEFINED
+
+#include "SkString.h"
+#include "SkTArray.h"
+#include "SkThread.h"
+#include "SkTime.h"
+#include "SkTypes.h"
+
+// Used to report status changes including failures.  All public methods are threadsafe.
+namespace DM {
+
+class Reporter : SkNoncopyable {
+public:
+    Reporter() : fPending(0), fFailed(0) {}
+
+    void taskCreated()   { sk_atomic_inc(&fPending); }
+    void taskDestroyed() { sk_atomic_dec(&fPending); }
+    void fail(SkString msg);
+
+    void printStatus(SkString name, SkMSec timeMs) const;
+
+    void getFailures(SkTArray<SkString>*) const;
+
+private:
+    int32_t fPending; // atomic
+    int32_t fFailed;  // atomic, == fFailures.count().
+
+    mutable SkMutex fMutex;  // Guards fFailures.
+    SkTArray<SkString> fFailures;
+};
+
+
+}  // namespace DM
+
+#endif  // DMReporter_DEFINED