Rename kES2_GrGLBinding to kES_GrGLBinding. Step 0 for supporting ES3.

src/gpu/gl/GrGLSL.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLSL.h"
 #include "GrGLShaderVar.h"
 #include "SkString.h"
 
 GrGLSLGeneration GrGetGLSLGeneration(GrGLBinding binding, const GrGLInterface* gl) {
     GrGLSLVersion ver = GrGLGetGLSLVersion(gl);
     switch (binding) {
         case kDesktop_GrGLBinding:
             GrAssert(ver >= GR_GLSL_VER(1,10));
             if (ver >= GR_GLSL_VER(1,50)) {
                 return k150_GrGLSLGeneration;
             } else if (ver >= GR_GLSL_VER(1,40)) {
                 return k140_GrGLSLGeneration;
             } else if (ver >= GR_GLSL_VER(1,30)) {
                 return k130_GrGLSLGeneration;
             } else {
                 return k110_GrGLSLGeneration;
             }
-        case kES2_GrGLBinding:
+        case kES_GrGLBinding:
             // version 1.00 of ES GLSL based on ver 1.20 of desktop GLSL
             GrAssert(ver >= GR_GL_VER(1,00));
             return k110_GrGLSLGeneration;
         default:
             GrCrash("Unknown GL Binding");
             return k110_GrGLSLGeneration; // suppress warning
     }
 }
 
 const char* GrGetGLSLVersionDecl(GrGLBinding binding, GrGLSLGeneration gen) {
     switch (gen) {
         case k110_GrGLSLGeneration:
-            if (kES2_GrGLBinding == binding) {
+            if (kES_GrGLBinding == binding) {
                 // ES2s shader language is based on version 1.20 but is version
                 // 1.00 of the ES language.
                 return "#version 100\n";
             } else {
                 GrAssert(kDesktop_GrGLBinding == binding);
                 return "#version 110\n";
             }
         case k130_GrGLSLGeneration:
             GrAssert(kDesktop_GrGLBinding == binding);
             return "#version 130\n";
@@ skipping 88 matching lines @@
                 GrAssert(kZeros_GrSLConstantVec == defaultExpr);
                 outAppend->append("0.0");
             }
         }
         return defaultExpr;
     } else {
         outAppend->appendf("(%s).%c", expr, GrColorComponentFlagToChar(component));
         return kNone_GrSLConstantVec;
     }
 }