Move shader precision modifier check onto GLSLCaps

src/gpu/effects/GrConvexPolyEffect.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 "GrConvexPolyEffect.h"
 #include "GrInvariantOutput.h"
 #include "SkPathPriv.h"
+#include "gl/GrGLContext.h"
 #include "gl/GrGLFragmentProcessor.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 
 //////////////////////////////////////////////////////////////////////////////
 class AARectEffect : public GrFragmentProcessor {
 public:
     const SkRect& getRect() const { return fRect; }
 
     static GrFragmentProcessor* Create(GrPrimitiveEdgeType edgeType, const SkRect& rect) {
         return new AARectEffect(edgeType, rect);
@@ skipping 326 matching lines @@
     }
 
     GrFragmentProcessor* fp;
     do {
         GrPrimitiveEdgeType edgeType = static_cast<GrPrimitiveEdgeType>(
                 d->fRandom->nextULessThan(kGrProcessorEdgeTypeCnt));
         fp = GrConvexPolyEffect::Create(edgeType, count, edges);
     } while (nullptr == fp);
     return fp;
 }