Implement caching in the tessellating path renderer, including strokes.

tests/TessellatingPathRendererTests.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPath.h"
 
 #if SK_SUPPORT_GPU
@@ skipping 229 matching lines @@
     GrStrokeInfo stroke(SkStrokeRec::kFill_InitStyle);
     GrPathRenderer::DrawPathArgs args;
     args.fTarget = dt;
     args.fPipelineBuilder = &pipelineBuilder;
     args.fResourceProvider = rp;
     args.fColor = GrColor_WHITE;
     args.fViewMatrix = &SkMatrix::I();
     args.fPath = &path;
     args.fStroke = &stroke;
     args.fAntiAlias = false;
+    args.fOrigSrcPath = nullptr;
+    args.fOrigStrokeInfo = nullptr;
     tess.drawPath(args);
 }
 
 DEF_GPUTEST(TessellatingPathRendererTests, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
     if (NULL == context) {
         return;
     }
     GrSurfaceDesc desc;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
@@ skipping 19 matching lines @@
     test_path(dt, rt, rp, create_path_8());
     test_path(dt, rt, rp, create_path_9());
     test_path(dt, rt, rp, create_path_10());
     test_path(dt, rt, rp, create_path_11());
     test_path(dt, rt, rp, create_path_12());
     test_path(dt, rt, rp, create_path_13());
     test_path(dt, rt, rp, create_path_14());
     test_path(dt, rt, rp, create_path_15());
 }
 #endif