Sketch DM refactor.

dm/DMQuiltTask.h

-#ifndef DMQuiltTask_DEFINED
-#define DMQuiltTask_DEFINED
-
-#include "DMTask.h"
-#include "SkBitmap.h"
-#include "SkString.h"
-#include "SkTemplates.h"
-#include "gm.h"
-
-// Records a GM through an SkPicture, draws it in tiles, and compares against the reference bitmap.
-
-namespace DM {
-
-class QuiltTask : public CpuTask {
-public:
-    enum BBH {
-        kNone_BBH,
-        kRTree_BBH,
-    };
-
-    QuiltTask(const Task& parent,  // QuiltTask must be a child task.  Pass its parent here.
-              skiagm::GM*,         // GM to run through a picture.  Takes ownership.
-              SkBitmap reference,  // Bitmap to compare picture replay results to.
-              BBH);
-
-    void draw() SK_OVERRIDE;
-    bool shouldSkip() const SK_OVERRIDE;
-    SkString name() const SK_OVERRIDE { return fName; }
-
-private:
-    const BBH fBBH;
-    const SkString fName;
-    SkAutoTDelete<skiagm::GM> fGM;
-    const SkBitmap fReference;
-};
-
-}  // namespace DM
-
-#endif  // DMReplayTask_DEFINED