Let DM run unit tests.

dm/DMTestTask.h

Index: dm/DMTestTask.h
diff --git a/dm/DMTestTask.h b/dm/DMTestTask.h
new file mode 100644
index 0000000000000000000000000000000000000000..a4903ee7170170710c781562a967366d686dac8d
--- /dev/null
+++ b/dm/DMTestTask.h
@@ -0,0 +1,50 @@
+#ifndef DMTestTask_DEFINED
+#define DMTestTask_DEFINED
+
+#include "DMReporter.h"
+#include "DMTask.h"
+#include "DMTaskRunner.h"
+#include "SkString.h"
+#include "SkTemplates.h"
+#include "Test.h"
+
+// Runs a unit test.
+namespace DM {
+
+class TestTask : public Task {
+public:
+    TestTask(Reporter*, TaskRunner*, skiatest::TestRegistry::Factory);
+
+    virtual void draw() SK_OVERRIDE;
+    virtual bool usesGpu() const SK_OVERRIDE { return fTest->isGPUTest(); }
+    virtual bool shouldSkip() const SK_OVERRIDE { return false; }
+    virtual SkString name() const SK_OVERRIDE { return fName; }
+
+private:
+    class TestReporter : public skiatest::Reporter {
+    public:
+      TestReporter() {}
+
+      const char* failure() const { return fFailure.c_str(); }
+
+    private:
+      virtual bool allowExtendedTest() const SK_OVERRIDE;
+      virtual bool allowThreaded()     const SK_OVERRIDE;
+      virtual bool verbose()           const SK_OVERRIDE;
+
+      virtual void onReportFailed(const SkString& desc) SK_OVERRIDE {
+          fFailure = desc;
+      }
+
+      SkString fFailure;
+    };
+
+    TaskRunner* fTaskRunner;
+    TestReporter fTestReporter;
+    SkAutoTDelete<skiatest::Test> fTest;
+    const SkString fName;
+};
+
+}  // namespace DM
+
+#endif // DMTestTask_DEFINED