Revert of Let DM run unit tests.

dm/DMTestTask.h

-#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