Move GLSL-specific routines/classes to separate glsl directory

src/gpu/glsl/GrGLSL.h

Index: src/gpu/glsl/GrGLSL.h
diff --git a/src/gpu/gl/GrGLSL.h b/src/gpu/glsl/GrGLSL.h
similarity index 94%
rename from src/gpu/gl/GrGLSL.h
rename to src/gpu/glsl/GrGLSL.h
index b338c991a6ca5415fcc157493b5bdea1cdb723a9..efe31fe2dd051ad3ecfbda2a7154ae7956e4b868 100644
--- a/src/gpu/gl/GrGLSL.h
+++ b/src/gpu/glsl/GrGLSL.h
@@ -8,14 +8,9 @@
 #ifndef GrGLSL_DEFINED
 #define GrGLSL_DEFINED
 
-#include "gl/GrGLInterface.h"
-#include "GrColor.h"
 #include "GrTypesPriv.h"
 #include "SkString.h"
 
-class GrGLContextInfo;
-class GrGLShaderVar;
-
 // Limited set of GLSL versions we build shaders for. Caller should round
 // down the GLSL version to one of these enums.
 enum GrGLSLGeneration {
@@ -45,25 +40,9 @@ enum GrGLSLGeneration {
     k310es_GrGLSLGeneration,
 };
 
-/**
- * Gets the most recent GLSL Generation compatible with the OpenGL context.
- */
-bool GrGetGLSLGeneration(const GrGLInterface* gl, GrGLSLGeneration* generation);
-
 bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration);
 
 /**
- * Returns a string to include at the beginning of a shader to declare the GLSL
- * version.
- */
-const char* GrGetGLSLVersionDecl(const GrGLContextInfo&);
-
-/**
- * Adds a line of GLSL code to declare the default precision for float types.
- */
-void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision, GrGLStandard, SkString* out);
-
-/**
  * Gets the name of the function that should be used to sample a 2D texture. Coord type is used
  * to indicate whether the texture is sampled using projective textured (kVec3f) or not (kVec2f).
  */