Revert of Sketch DM refactor.

dm/DMPDFRasterizeTask.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef DMPDFRasterizeTask_DEFINED
+#define DMPDFRasterizeTask_DEFINED
+
+#include "DMTask.h"
+#include "SkBitmap.h"
+#include "SkData.h"
+#include "SkStream.h"
+#include "SkString.h"
+#include "SkTemplates.h"
+
+namespace DM {
+
+typedef bool (*RasterizePdfProc)(SkStream* pdf, SkBitmap* output);
+
+class PDFRasterizeTask : public CpuTask {
+public:
+    // takes ownership of SkStreamAsset.
+    PDFRasterizeTask(const Task& parent,
+                     SkStreamAsset* pdf,
+                     RasterizePdfProc);
+
+    void draw() SK_OVERRIDE;
+    bool shouldSkip() const SK_OVERRIDE { return NULL == fRasterize; }
+    SkString name()   const SK_OVERRIDE { return fName; }
+
+private:
+    const SkString fName;
+    SkAutoTDelete<SkStreamAsset> fPdf;
+    RasterizePdfProc fRasterize;
+};
+
+}  // namespace DM
+
+#endif  // DMPDFRasterizeTask_DEFINED