bug fix for glsl identity string

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"
@@ skipping 58 matching lines @@
             if (info.caps()->isCoreProfile()) {
                 return "#version 150\n";
             } else {
                 return "#version 150 compatibility\n";
             }
         case k330_GrGLSLGeneration:
             if (kGLES_GrGLStandard == info.standard()) {
                 return "#version 300 es\n";
             } else {
                 SkASSERT(kGL_GrGLStandard == info.standard());
-                return "#version 330 compatibility\n";
+                if (info.caps()->isCoreProfile()) {
+                    return "#version 330\n";
+                } else {
+                    return "#version 330 compatibility\n";
+                }
             }
         case k310es_GrGLSLGeneration:
             SkASSERT(kGLES_GrGLStandard == info.standard());
             return "#version 310 es\n";
         default:
             SkFAIL("Unknown GL version.");
             return ""; // suppress warning
     }
 }
 
 void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSLExpr4& mulFactor) {
     if (mulFactor.isOnes()) {
         *outAppend = SkString();
     }
 
     if (mulFactor.isZeros()) {
         outAppend->appendf("%s = vec4(0);", vec4VarName);
     } else {
         outAppend->appendf("%s *= %s;", vec4VarName, mulFactor.c_str());
     }
 }