Conditionally insert gl_PointSize into shaders.

src/gpu/glsl/GrGLSLVertexShaderBuilder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLSLVertexShaderBuilder.h"
 #include "glsl/GrGLSLProgramBuilder.h"
 #include "glsl/GrGLSLUniformHandler.h"
@@ skipping 28 matching lines @@
                           posVar.c_str(), fRtAdjustName,
                           posVar.c_str(), fRtAdjustName,
                           posVar.c_str());
     } else {
         SkASSERT(kVec2f_GrSLType == posVar.getType());
         this->codeAppendf("gl_Position = vec4(%s.x * %s.x + %s.y, %s.y * %s.z + %s.w, 0, 1);",
                           posVar.c_str(), fRtAdjustName, fRtAdjustName,
                           posVar.c_str(), fRtAdjustName, fRtAdjustName);
     }
     // We could have the GrGeometryProcessor do this, but its just easier to have it performed
-    // here. If we ever need to set variable pointsize, then we can reinvestigate
-    this->codeAppend("gl_PointSize = 1.0;");
+    // here. If we ever need to set variable pointsize, then we can reinvestigate.
+    if (this->getProgramBuilder()->desc().header().fHasPointSize) {
+        this->codeAppend("gl_PointSize = 1.0;");
+    }
 }
 
 void GrGLSLVertexBuilder::onFinalize() {
     fProgramBuilder->varyingHandler()->getVertexDecls(&this->inputs(), &this->outputs());
 }