added support for PLS path rendering

src/gpu/GrPLSGeometryProcessor.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 GrPLSGeometryProcessor_DEFINED
+#define GrPLSGeometryProcessor_DEFINED
+
+#include "GrGeometryProcessor.h"
+
+/**
+ * A minor extension to GrGeometryProcessor that adds bounds tracking for pixel local storage
+ * purposes.
+ */
+class GrPLSGeometryProcessor : public GrGeometryProcessor {
+public:
+    SkRect fBounds;

[bsalomon, 2016/01/13 19:15:34]

public?

+
+    GrPixelLocalStorageState getPixelLocalStorageState() const override { 
+        return GrPixelLocalStorageState::kDraw_State;
+    }
+};
+
+#endif