Add a GrCustomCoordsTextureEffect class

include/gpu/GrEffect.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrEffect_DEFINED
 #define GrEffect_DEFINED
 
@@ skipping 67 matching lines @@
     memory pool. The ref count of an effect must reach 0 before the thread terminates and the pool
     is destroyed. To create a static effect use the macro GR_CREATE_STATIC_EFFECT declared below.
   */
 class GrEffect : private SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrEffect)
 
     /**
      * The types of vertex coordinates available to an effect in the vertex shader. Effects can
      * require their own vertex attribute but these coordinates are made available by the framework
-     * in all programs. kCustom_CoordsType is provided to signify that an alternative set of coords
-     * is used (usually an explicit vertex attribute) but its meaning is determined by the effect
-     * subclass.
+     * in all programs.
      */
     enum CoordsType {
         kLocal_CoordsType,
         kPosition_CoordsType,
-
-        kCustom_CoordsType,
     };
 
     virtual ~GrEffect();
 
     /**
      * This function is used to perform optimizations. When called the color and validFlags params
      * indicate whether the input components to this effect in the FS will have known values.
      * validFlags is a bitfield of GrColorComponentFlags. The function updates both params to
      * indicate known values of its output. A component of the color param only has meaning if the
      * corresponding bit in validFlags is set.
@@ skipping 228 matching lines @@
 };                                                                                                \
 static SkAlignedSStorage<k_##NAME##_StorageSize> g_##NAME##_Storage;                              \
 static void* NAME##_RefLocation = (char*)g_##NAME##_Storage.get() + k_##NAME##_EffectRefOffset;   \
 static GrEffect* NAME##_Effect SkNEW_PLACEMENT_ARGS(g_##NAME##_Storage.get(), EFFECT_CLASS, ARGS);\
 static SkAutoTDestroy<GrEffect> NAME##_ad(NAME##_Effect);                                         \
 static GrEffectRef* NAME(GrEffect::CreateStaticEffectRef(NAME##_RefLocation, NAME##_Effect));     \
 static SkAutoTDestroy<GrEffectRef> NAME##_Ref_ad(NAME)
 
 
 #endif