Pull out shader-specific caps into GrShaderCaps and GrGLSLCaps

include/gpu/GrXferProcessor.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 GrXferProcessor_DEFINED
 #define GrXferProcessor_DEFINED
 
 #include "GrColor.h"
 #include "GrProcessor.h"
 #include "GrTexture.h"
 #include "GrTypes.h"
 #include "SkXfermode.h"
 
-class GrDrawTargetCaps;
-class GrGLCaps;
-typedef GrGLCaps GrGLSLCaps;
+class GrShaderCaps;
+class GrGLSLCaps;
 class GrGLXferProcessor;
 class GrProcOptInfo;
 
 /**
  * Coeffecients for alpha-blending.
  */
 enum GrBlendCoeff {
     kInvalid_GrBlendCoeff = -1,
 
     kZero_GrBlendCoeff,    //<! 0
@@ skipping 296 matching lines @@
     enum {
         kIllegalXPFClassID = 0,
     };
     static int32_t gCurrXPFClassID;
 
     typedef GrProgramElement INHERITED;
 };
 
 #endif