Add optional sw generated path coverage mask caching

src/gpu/GrDrawingManager.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 "GrDrawingManager.h"
 
 #include "GrContext.h"
@@ skipping 185 matching lines @@
                                                   GrPathRendererChain::DrawType drawType,
                                                   GrPathRenderer::StencilSupport* stencilSupport) {
 
     if (!fPathRendererChain) {
         fPathRendererChain = new GrPathRendererChain(fContext, fOptionsForPathRendererChain);
     }
 
     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;
     }
 
     return pr;
 }
 
 sk_sp<GrDrawContext> GrDrawingManager::makeDrawContext(sk_sp<GrRenderTarget> rt,
                                                        sk_sp<SkColorSpace> colorSpace,
                                                        const SkSurfaceProps* surfaceProps) {
@@ skipping 22 matching lines @@
                                                         std::move(colorSpace), surfaceProps,
                                                         fContext->getAuditTrail(), fSingleOwner));
         }
     }
 
     return sk_sp<GrDrawContext>(new GrDrawContext(fContext, this, std::move(rt),
                                                   std::move(colorSpace), surfaceProps,
                                                   fContext->getAuditTrail(),
                                                   fSingleOwner));
 }