Move GLSL-specific routines/classes to separate glsl directory

src/gpu/gl/GrGLShaderVar.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLShaderVar_DEFINED
 #define GrGLShaderVar_DEFINED
 
 #include "GrGLContext.h"
-#include "GrGLSL.h"
 #include "GrShaderVar.h"
 
 #define USE_UNIFORM_FLOAT_ARRAYS true
 
 /**
  * Represents a variable in a shader
  */
 class GrGLShaderVar : public GrShaderVar {
 public:
     /**
@@ skipping 223 matching lines @@
 
     Origin          fOrigin;
     /// Work around driver bugs on some hardware that don't correctly
     /// support uniform float []
     bool            fUseUniformFloatArrays;
 
     typedef GrShaderVar INHERITED;
 };
 
 #endif