Make GrGLShaderBuilder responsible for enabling GLSL extensions

src/gpu/gl/GrGLProgram.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 "GrGLProgram.h"
 
 #include "GrAllocator.h"
@@ skipping 444 matching lines @@
     }
 
     bool needColorFilterUniform;
     bool needComputedColor;
     need_blend_inputs(uniformCoeff, colorCoeff,
                       &needColorFilterUniform, &needComputedColor);
 
     // the dual source output has no canonical var name, have to
     // declare an output, which is incompatible with gl_FragColor/gl_FragData.
     bool dualSourceOutputWritten = false;
-    builder.fHeader.append(GrGetGLSLVersionDecl(fContext.info().binding(),
-                                                fContext.info().glslGeneration()));
 
     GrGLShaderVar colorOutput;
     bool isColorDeclared = GrGLSLSetupFSColorOuput(fContext.info().glslGeneration(),
                                                    declared_color_output_name(),
                                                    &colorOutput);
     if (isColorDeclared) {
         builder.fFSOutputs.push_back(colorOutput);
     }
 
     const char* viewMName;
@@ skipping 476 matching lines @@
             SkScalarToFloat(m[SkMatrix::kMTransX]),
             SkScalarToFloat(m[SkMatrix::kMTransY]),
             SkScalarToFloat(m[SkMatrix::kMPersp2])
         };
         fUniformManager.setMatrix3f(fUniformHandles.fViewMatrixUni, mt);
         fMatrixState.fViewMatrix = drawState.getViewMatrix();
         fMatrixState.fRenderTargetSize = size;
         fMatrixState.fRenderTargetOrigin = rt->origin();
     }
 }