Revert of Begin weaning GrClipMaskManager off of GrDrawTarget (take 2)

src/gpu/GrPipelineBuilder.h

Index: src/gpu/GrPipelineBuilder.h
diff --git a/src/gpu/GrPipelineBuilder.h b/src/gpu/GrPipelineBuilder.h
index f66ced30257bbf886222a661da877b24fbc67155..f5fe9f80dc38196d583183845a0990684b88eced 100644
--- a/src/gpu/GrPipelineBuilder.h
+++ b/src/gpu/GrPipelineBuilder.h
@@ -155,6 +155,14 @@
     }
 
     /**
+     * Sets a GrXPFactory that will ignore src color and perform a set operation between the draws
+     * output coverage and the destination. This is useful to render coverage masks as CSG.
+     */
+    void setCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage = false) {
+        fXPFactory.reset(GrCoverageSetOpXPFactory::Create(regionOp, invertCoverage));
+    }
+
+    /**
      * Sets a GrXPFactory that disables color writes to the destination. This is useful when
      * rendering to the stencil buffer.
      */