Implement caching in the tessellating path renderer, including strokes.

src/gpu/GrClipMaskManager.cpp

Index: src/gpu/GrClipMaskManager.cpp
diff --git a/src/gpu/GrClipMaskManager.cpp b/src/gpu/GrClipMaskManager.cpp
index 3363795108fd721aec12fa66595f17c85e176b47..3e74c809ee4c9b2112a19b58b1235f4cfe54deb3 100644
--- a/src/gpu/GrClipMaskManager.cpp
+++ b/src/gpu/GrClipMaskManager.cpp
@@ -441,6 +441,8 @@ bool GrClipMaskManager::drawElement(GrPipelineBuilder* pipelineBuilder,
             args.fPath = &path;
             args.fStroke = &stroke;
             args.fAntiAlias = element->isAA();
+            args.fOrigSrcPath = nullptr;
+            args.fOrigStrokeInfo = nullptr;
             pr->drawPath(args);
             break;
         }
@@ -845,6 +847,8 @@ bool GrClipMaskManager::createStencilClipMask(GrRenderTarget* rt,
                             args.fPath = &clipPath;
                             args.fStroke = &stroke;
                             args.fAntiAlias = false;
+                            args.fOrigSrcPath = nullptr;
+                            args.fOrigStrokeInfo = nullptr;
                             pr->drawPath(args);
                         } else {
                             GrPathRenderer::StencilPathArgs args;
@@ -883,6 +887,8 @@ bool GrClipMaskManager::createStencilClipMask(GrRenderTarget* rt,
                         args.fPath = &clipPath;
                         args.fStroke = &stroke;
                         args.fAntiAlias = false;
+                        args.fOrigSrcPath = nullptr;
+                        args.fOrigStrokeInfo = nullptr;
                         pr->drawPath(args);
                     }
                 } else {