Revert of Move copy-surface-as-draw fallback to GrGLGpu.

src/gpu/gl/GrGLSL.h

Index: src/gpu/gl/GrGLSL.h
diff --git a/src/gpu/gl/GrGLSL.h b/src/gpu/gl/GrGLSL.h
index db8e1bdca5092a42f7524604d462c88d3b4bf9e4..99671c130e0c5e3a431cc5b74a0ba27f2be7594c 100644
--- a/src/gpu/gl/GrGLSL.h
+++ b/src/gpu/gl/GrGLSL.h
@@ -55,24 +55,6 @@
  * 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).
- */
-inline const char* GrGLSLTexture2DFunctionName(GrSLType coordType, GrGLSLGeneration glslGen) {
-    if (kVec2f_GrSLType == coordType) {
-        return glslGen >= k130_GrGLSLGeneration ? "texture" : "texture2D";
-    } else {
-        SkASSERT(kVec3f_GrSLType == coordType);
-        return glslGen >= k130_GrGLSLGeneration ? "textureProj" : "texture2DProj";
-    }
-}
 
 /**
  * Converts a GrSLType to a string containing the name of the equivalent GLSL type.