Push creation of default GP to the caller

src/gpu/GrDefaultGeoProcFactory.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDefaultGeoProcFactory_DEFINED
 #define GrDefaultGeoProcFactory_DEFINED
 
@@ skipping 57 matching lines @@
     };
 
     enum GPType {
         kPosition_GPType = 0x0, // we ALWAYS have position
         kColor_GPType = 0x01,
         kLocalCoord_GPType = 0x02,
         kCoverage_GPType= 0x04,
         kLastGPType = kCoverage_GPType
     };
 
-    // YOU MUST UNREF
-    static const GrGeometryProcessor* CreateAndSetAttribs(GrDrawState*, uint32_t GPTypeFlags);
-    static const GrGeometryProcessor* Create();
+    /*
+     * The following functions are used to create default GPs.  If you just need to create
+     * attributes seperately from creating the default GP, use the SetAttribs function followed
+     * by the Create function.  Otherwise use CreateAndSetAttribs to do both at once.
+     *
+     * You must unref the return from Create.
+     */
+    static void SetAttribs(GrDrawState*, uint32_t GPTypeFlags = 0);
+    static const GrGeometryProcessor* CreateAndSetAttribs(GrDrawState*, uint32_t GPTypeFlags = 0);
+    static const GrGeometryProcessor* Create(bool hasAttributeCoverage);
 };
 
 #endif