Move shader precision modifier check onto GLSLCaps

src/effects/gradients/SkGradientShader.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGradientShaderPriv.h"
 #include "SkLinearGradient.h"
 #include "SkRadialGradient.h"
@@ skipping 890 matching lines @@
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSweepGradient)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointConicalGradient)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #if SK_SUPPORT_GPU
 
 #include "effects/GrTextureStripAtlas.h"
 #include "GrInvariantOutput.h"
+#include "gl/GrGLContext.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "SkGr.h"
 
 GrGLGradientEffect::GrGLGradientEffect()
     : fCachedYCoord(SK_ScalarMax) {
 }
 
 GrGLGradientEffect::~GrGLGradientEffect() { }
 
 void GrGLGradientEffect::emitUniforms(GrGLFPBuilder* builder, const GrGradientEffect& ge) {
@@ skipping 283 matching lines @@
             (*stops)[i] = stop;
             stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f;
         }
     }
     *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount));
 
     return outColors;
 }
 
 #endif