Add gl_SampleMask functionality to fragment builders

src/gpu/gl/GrGLGLSL.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 "GrGLGLSL.h"
 #include "GrGLContext.h"
 #include "GrGLUtil.h"
 #include "SkString.h"
 
 bool GrGLGetGLSLGeneration(const GrGLInterface* gl, GrGLSLGeneration* generation) {
     SkASSERT(generation);
     GrGLSLVersion ver = GrGLGetGLSLVersion(gl);
     if (GR_GLSL_INVALID_VER == ver) {
         return false;
     }
     switch (gl->fStandard) {
         case kGL_GrGLStandard:
             SkASSERT(ver >= GR_GLSL_VER(1,10));
-            if (ver >= GR_GLSL_VER(3,30)) {
+            if (ver >= GR_GLSL_VER(4,00)) {
+                *generation = k400_GrGLSLGeneration;
+            } else if (ver >= GR_GLSL_VER(3,30)) {
                 *generation = k330_GrGLSLGeneration;
             } else if (ver >= GR_GLSL_VER(1,50)) {
                 *generation = k150_GrGLSLGeneration;
             } else if (ver >= GR_GLSL_VER(1,40)) {
                 *generation = k140_GrGLSLGeneration;
             } else if (ver >= GR_GLSL_VER(1,30)) {
                 *generation = k130_GrGLSLGeneration;
             } else {
                 *generation = k110_GrGLSLGeneration;
             }
             return true;
         case kGLES_GrGLStandard:
             SkASSERT(ver >= GR_GL_VER(1,00));
-            if (ver >= GR_GLSL_VER(3,1)) {
+            if (ver >= GR_GLSL_VER(3,20)) {
+                *generation = k320es_GrGLSLGeneration;
+            } else if (ver >= GR_GLSL_VER(3,10)) {
                 *generation = k310es_GrGLSLGeneration;
-            }
-            else if (ver >= GR_GLSL_VER(3,0)) {
+            } else if (ver >= GR_GLSL_VER(3,00)) {
                 *generation = k330_GrGLSLGeneration;
             } else {
                 *generation = k110_GrGLSLGeneration;
             }
             return true;
         default:
             SkFAIL("Unknown GL Standard");
             return false;
     }
 }