Revert of Sketch DM refactor.

dm/DMPDFTask.h

+#ifndef DMPDFTask_DEFINED
+#define DMPDFTask_DEFINED
+
+#include "DMPDFRasterizeTask.h"
+#include "DMTask.h"
+#include "SkBitmap.h"
+#include "SkPicture.h"
+#include "SkString.h"
+#include "SkTemplates.h"
+#include "gm.h"
+
+namespace DM {
+
+// This task renders a GM or SKP using Skia's PDF backend.
+// If rasterizePdfProc is non-NULL, it will spawn a PDFRasterizeTask.
+class PDFTask : public CpuTask {
+public:
+    PDFTask(const char*,
+            Reporter*,
+            TaskRunner*,
+            skiagm::GMRegistry::Factory,
+            RasterizePdfProc);
+
+    PDFTask(Reporter*,
+            TaskRunner*,
+            const SkPicture*,
+            SkString name,
+            RasterizePdfProc);
+
+    void draw() SK_OVERRIDE;
+
+    bool shouldSkip() const SK_OVERRIDE;
+
+    SkString name() const SK_OVERRIDE { return fName; }
+
+private:
+    // One of these two will be set.
+    SkAutoTDelete<skiagm::GM> fGM;
+    SkAutoTUnref<const SkPicture> fPicture;
+
+    const SkString fName;
+    RasterizePdfProc fRasterize;
+};
+
+}  // namespace DM
+
+#endif  // DMPDFTask_DEFINED