Revert of removing equality / compute invariant loops from GrGeometryProcessors

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 67 matching lines @@
      * 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.
      */
     // TODO clean this up
     static const GrGeometryProcessor* Create(uint32_t gpTypeFlags,
                                              GrColor,
                                              const SkMatrix& viewMatrix = SkMatrix::I(),
                                              const SkMatrix& localMatrix = SkMatrix::I(),
+                                             bool opaqueVertexColors = false,
                                              uint8_t coverage = 0xff);
 
     static size_t DefaultVertexStride() { return sizeof(PositionAttr); }
 };
 
 #endif