Use highp for gpu bezier effects

src/gpu/gl/builders/GrGLShaderBuilder.cpp

Index: src/gpu/gl/builders/GrGLShaderBuilder.cpp
diff --git a/src/gpu/gl/builders/GrGLShaderBuilder.cpp b/src/gpu/gl/builders/GrGLShaderBuilder.cpp
index 4dea14263214c778b396289b7378cc47f36634b9..6b3e1d12dd7e3948a365b428520b915df77052c9 100644
--- a/src/gpu/gl/builders/GrGLShaderBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLShaderBuilder.cpp
@@ -62,6 +62,12 @@ GrGLShaderBuilder::GrGLShaderBuilder(GrGLProgramBuilder* program)
     , fFeaturesAddedMask(0) {
 }
 
+void GrGLShaderBuilder::declAppend(const GrGLShaderVar& var) {
+    SkString tempDecl;
+    var.appendDecl(fProgramBuilder->ctxInfo(), &tempDecl);
+    this->codeAppendf("%s;", tempDecl.c_str());
+}
+
 void GrGLShaderBuilder::emitFunction(GrSLType returnType,
                                      const char* name,
                                      int argCnt,