DM: add pdf

dm/DMPDFRasterizeTask.h

Index: dm/DMPDFRasterizeTask.h
diff --git a/dm/DMPDFRasterizeTask.h b/dm/DMPDFRasterizeTask.h
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index 0000000000000000000000000000000000000000..2e24b894e7a05642bbcdfc4f188492da87341262
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+++ b/dm/DMPDFRasterizeTask.h
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+/*
+ * 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 "DMExpectations.h"
+#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:
+    PDFRasterizeTask(const Task& parent,
+                     SkData* pdf,
+                     const Expectations&,
+                     RasterizePdfProc);
+
+    virtual void draw() SK_OVERRIDE;
+    virtual bool shouldSkip() const SK_OVERRIDE { return NULL == fRasterize; }
+    virtual SkString name()   const SK_OVERRIDE { return fName; }
+
+private:
+    const SkString fName;
+    SkAutoTUnref<SkData> fPdf;
+    const Expectations& fExpectations;
+    RasterizePdfProc fRasterize;
+};
+
+}  // namespace DM
+
+#endif  // DMPDFRasterizeTask_DEFINED