Let DM run unit tests.

dm/DMReporter.h

 #ifndef DMReporter_DEFINED
 #define DMReporter_DEFINED
 
 #include "SkString.h"
 #include "SkTArray.h"
 #include "SkThread.h"
 #include "SkTypes.h"
 
 // Used to report status changes including failures.  All public methods are threadsafe.
-
 namespace DM {
 
 class Reporter : SkNoncopyable {
 public:
     Reporter() : fStarted(0), fFinished(0) {}
 
     void start()  { sk_atomic_inc(&fStarted); }
-    void finish() { sk_atomic_inc(&fFinished); }
-    void fail(SkString name);
+    void finish(SkString name);
+    void fail(SkString msg);
 
     int32_t started()  const { return fStarted; }
     int32_t finished() const { return fFinished; }
     int32_t failed()   const;
 
-    void updateStatusLine() const;
-
     void getFailures(SkTArray<SkString>*) const;
 
 private:
     int32_t fStarted, fFinished;
 
     mutable SkMutex fMutex;  // Guards fFailures.
     SkTArray<SkString> fFailures;
 };
 
 
 }  // namespace DM
 
 #endif  // DMReporter_DEFINED