Create GrPathRenderingDrawContext

src/gpu/GrPathRenderingDrawContext.h

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrPathRenderingDrawContext_DEFINED
+#define GrPathRenderingDrawContext_DEFINED
+
+#include "GrDrawContext.h"
+
+class GrStencilAndCoverTextContext;
+
+class GrPathRenderingDrawContext : public GrDrawContext {
+public:
+    void drawText(const GrClip&,  const GrPaint&, const SkPaint&,
+                  const SkMatrix& viewMatrix, const char text[], size_t byteLength,
+                  SkScalar x, SkScalar y, const SkIRect& clipBounds) override;
+    void drawPosText(const GrClip&, const GrPaint&, const SkPaint&,
+                     const SkMatrix& viewMatrix, const char text[], size_t byteLength,
+                     const SkScalar pos[], int scalarsPerPosition,
+                     const SkPoint& offset, const SkIRect& clipBounds) override;
+    void drawTextBlob(const GrClip&, const SkPaint&,
+                      const SkMatrix& viewMatrix, const SkTextBlob*,
+                      SkScalar x, SkScalar y,
+                      SkDrawFilter*, const SkIRect& clipBounds) override;
+protected:
+    GrPathRenderingDrawContext(GrContext* ctx, GrDrawingManager* mgr, GrRenderTarget* rt,
+                               const SkSurfaceProps* surfaceProps, GrAuditTrail* at,
+                               GrSingleOwner* so)
+        : INHERITED(ctx, mgr, rt, surfaceProps, at, so)
+        , fStencilAndCoverTextContext(nullptr) {}
+
+private:
+    GrStencilAndCoverTextContext* fStencilAndCoverTextContext;
+
+    friend class GrDrawingManager; // for ctor
+
+    typedef GrDrawContext INHERITED;
+};
+
+#endif