Put drawPath in GrBatch.

src/gpu/batches/GrDrawPathBatch.h

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrDrawPathBatch_DEFINED
+#define GrDrawPathBatch_DEFINED
+
+#include "GrDrawBatch.h"
+#include "GrGpu.h"
+#include "GrPath.h"
+#include "GrPathRendering.h"
+#include "GrPathProcessor.h"
+
+class GrDrawPathBatch final : public GrDrawBatch {
+public:
+    // This must return the concrete type because we install the stencil settings late :(
+    static GrDrawPathBatch* Create(const GrPathProcessor* primProc, const GrPath* path) {
+        return SkNEW_ARGS(GrDrawPathBatch, (primProc, path));
+    }
+
+    const char* name() const override { return "DrawPath"; }
+
+    SkString dumpInfo() const override {
+        SkString string;
+        string.printf("PATH: 0x%p", fPath.get());
+        return string;
+    }
+
+    virtual void getInvariantOutputColor(GrInitInvariantOutput* out) const {
+        fPrimitiveProcessor->getInvariantOutputColor(out);
+    }
+
+    virtual void getInvariantOutputCoverage(GrInitInvariantOutput* out) const {
+        fPrimitiveProcessor->getInvariantOutputCoverage(out);
+    }
+
+    void setStencilSettings(const GrStencilSettings& stencil) { fStencilSettings = stencil; }
+
+private:
+    GrBatchTracker* tracker() { return reinterpret_cast<GrBatchTracker*>(&fWhatchamacallit); }
+    GrDrawPathBatch(const GrPathProcessor* primProc, const GrPath* path)
+    : fPrimitiveProcessor(primProc)
+    , fPath(path) {
+        fBounds = path->getBounds();
+        primProc->viewMatrix().mapRect(&fBounds);
+        this->initClassID<GrDrawPathBatch>();
+    }
+
+    virtual void initBatchTracker(const GrPipelineOptimizations& opts) {
+        fPrimitiveProcessor->initBatchTracker(this->tracker(), opts);
+    }
+
+    bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { return false; }
+
+    void onPrepare(GrBatchFlushState*) override {}
+
+    void onDraw(GrBatchFlushState* state) override {
+        GrProgramDesc  desc;
+        state->gpu()->buildProgramDesc(&desc, *fPrimitiveProcessor.get(),
+                                       *this->pipeline(), *this->tracker());
+        GrPathRendering::DrawPathArgs args(fPrimitiveProcessor.get(), this->pipeline(),
+                                           &desc, this->tracker(), &fStencilSettings);
+        state->gpu()->pathRendering()->drawPath(args, fPath.get());
+    }
+
+    GrPendingProgramElement<const GrPathProcessor>      fPrimitiveProcessor;
+    PathBatchTracker                                    fWhatchamacallit; // TODO: delete this
+    GrStencilSettings                                   fStencilSettings;
+    GrPendingIOResource<const GrPath, kRead_GrIOType>   fPath;
+};
+
+#endif