Push isEqual/onIsEqual down from GrProcessor to subclasses.

include/gpu/GrGeometryProcessor.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGeometryProcessor_DEFINED
 #define GrGeometryProcessor_DEFINED
 
@@ skipping 19 matching lines @@
     /*
      * This only has a max because GLProgramsTest needs to generate test arrays, and these have to
      * be static
      * TODO make this truly dynamic
      */
     static const int kMaxVertexAttribs = 2;
     typedef SkTArray<GrShaderVar, true> VertexAttribArray;
 
     const VertexAttribArray& getVertexAttribs() const { return fVertexAttribs; }
 
+    bool isEqual(const GrGeometryProcessor& that) const {
+        if (&this->getFactory() != &that.getFactory()) {
+            return false;
+        }
+        bool result = this->onIsEqual(that);
+#ifdef SK_DEBUG
+        if (result) {
+            this->assertTexturesEqual(that);
+        }
+#endif
+        return result;
+    }
+
 protected:
     /**
      * Subclasses call this from their constructor to register vertex attributes (at most
      * kMaxVertexAttribs). This must only be called from the constructor because GrProcessors are
      * immutable.
      */
     const GrShaderVar& addVertexAttrib(const GrShaderVar& var) {
         SkASSERT(fVertexAttribs.count() < kMaxVertexAttribs);
         return fVertexAttribs.push_back(var);
     }
 
 private:
+    virtual bool onIsEqual(const GrGeometryProcessor&) const = 0;
+
     SkSTArray<kMaxVertexAttribs, GrShaderVar, true> fVertexAttribs;
 
     typedef GrProcessor INHERITED;
 };
 
 /**
  * This creates an effect outside of the effect memory pool. The effect's destructor will be called
  * at global destruction time. NAME will be the name of the created GrProcessor.
  */
 #define GR_CREATE_STATIC_GEOMETRY_PROCESSOR(NAME, GP_CLASS, ARGS)                                 \
 static SkAlignedSStorage<sizeof(GP_CLASS)> g_##NAME##_Storage;                                    \
 static GrGeometryProcessor* NAME SkNEW_PLACEMENT_ARGS(g_##NAME##_Storage.get(), GP_CLASS, ARGS);  \
 static SkAutoTDestroy<GrGeometryProcessor> NAME##_ad(NAME);
 
 #endif