Add appendPrecisionModifier method to GrGLSLShaderBuilder

src/gpu/effects/GrTextureDomain.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureDomain.h"
 #include "GrInvariantOutput.h"
 #include "GrSimpleTextureEffect.h"
@@ skipping 85 matching lines @@
                 // may require a gradient calculation inside a conditional block
                 // may return undefined results". This appears to be an issue with
                 // the 'any' call since even the simple "result=black; if (any())
                 // result=white;" code fails to compile.
                 builder->codeAppend("vec4 outside = vec4(0.0, 0.0, 0.0, 0.0);");
                 builder->codeAppend("vec4 inside = ");
                 builder->appendTextureLookupAndModulate(inModulateColor, sampler,
                                                           inCoords.c_str());
                 builder->codeAppend(";");
 
-                builder->codeAppend(GrGLSLShaderVar::PrecisionString(glslCaps,
-                                                                     kHigh_GrSLPrecision));
+                builder->appendPrecisionModifier(kHigh_GrSLPrecision);
                 builder->codeAppendf("float x = (%s).x;", inCoords.c_str());
-                builder->codeAppend(GrGLSLShaderVar::PrecisionString(glslCaps,
-                                                                     kHigh_GrSLPrecision));
+                builder->appendPrecisionModifier(kHigh_GrSLPrecision);
                 builder->codeAppendf("float y = (%s).y;", inCoords.c_str());
 
                 builder->codeAppendf("x = abs(2.0*(x - %s.x)/(%s.z - %s.x) - 1.0);",
                                      domain, domain, domain);
                 builder->codeAppendf("y = abs(2.0*(y - %s.y)/(%s.w - %s.y) - 1.0);",
                                      domain, domain, domain);
                 builder->codeAppend("float blend = step(1.0, max(x, y));");
                 builder->codeAppendf("%s = mix(inside, outside, blend);", outColor);
             } else {
                 builder->codeAppend("bvec4 outside;\n");
@@ skipping 173 matching lines @@
     bool bilerp = mode != GrTextureDomain::kRepeat_Mode ? d->fRandom->nextBool() : false;
     GrCoordSet coords = d->fRandom->nextBool() ? kLocal_GrCoordSet : kDevice_GrCoordSet;
     return GrTextureDomainEffect::Create(
         d->fTextures[texIdx],
         matrix,
         domain,
         mode,
         bilerp ? GrTextureParams::kBilerp_FilterMode : GrTextureParams::kNone_FilterMode,
         coords);
 }