Move shader precision out of GrShaderVar

src/gpu/gl/builders/GrGLFragmentShaderBuilder.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 GrGLFragmentShaderBuilder_DEFINED
 #define GrGLFragmentShaderBuilder_DEFINED
 
@@ skipping 99 matching lines @@
     bool hasReadDstColor() const { return fHasReadDstColor; }
     bool hasReadFragmentPosition() const { return fHasReadFragmentPosition; }
     void reset() {
         fHasReadDstColor = false;
         fHasReadFragmentPosition = false;
     }
 
     /*
      * An internal call for GrGLProgramBuilder to use to add varyings to the vertex shader
      */
-    void addVarying(GrGLVarying*, GrGLShaderVar::Precision);
+    void addVarying(GrGLVarying*, GrSLPrecision);
 
     /**
      * Features that should only be enabled by GrGLFragmentShaderBuilder itself.
      */
     enum GLSLPrivateFeature {
         kFragCoordConventions_GLSLPrivateFeature = kLastGLSLFeature + 1,
         kLastGLSLPrivateFeature = kFragCoordConventions_GLSLPrivateFeature
     };
 
     // Interpretation of DstReadKey when generating code
@@ skipping 24 matching lines @@
     bool fHasReadDstColor;
     bool fHasReadFragmentPosition;
 
     friend class GrGLNvprProgramBuilder;
     friend class GrGLProgramBuilder;
 
     typedef GrGLFPFragmentBuilder INHERITED;
 };
 
 #endif