Add optional sw generated path coverage mask caching

src/gpu/GrDrawingManager.cpp

Index: src/gpu/GrDrawingManager.cpp
diff --git a/src/gpu/GrDrawingManager.cpp b/src/gpu/GrDrawingManager.cpp
index 606a9abd6e43c3530661e3e2c28e3949cdac6ed6..22dee0967e39ace3e48fe9a40602ee517f234e42 100644
--- a/src/gpu/GrDrawingManager.cpp
+++ b/src/gpu/GrDrawingManager.cpp
@@ -203,7 +203,9 @@ GrPathRenderer* GrDrawingManager::getPathRenderer(const GrPathRenderer::CanDrawP
     GrPathRenderer* pr = fPathRendererChain->getPathRenderer(args, drawType, stencilSupport);
     if (!pr && allowSW) {
         if (!fSoftwarePathRenderer) {
-            fSoftwarePathRenderer = new GrSoftwarePathRenderer(fContext->textureProvider());
+            fSoftwarePathRenderer =
+                    new GrSoftwarePathRenderer(fContext->textureProvider(),
+                                               fOptionsForPathRendererChain.fAllowPathMaskCaching);
         }
         pr = fSoftwarePathRenderer;
     }