Rename flag from "distance field" to "device independent."

bench/nanobench.cpp

Index: bench/nanobench.cpp
diff --git a/bench/nanobench.cpp b/bench/nanobench.cpp
index c79c75d52bbf5eefced529c30bdaa2cf134544fb..a5a70d9220b768a89454ccaa8cbdf2fd1be521b9 100644
--- a/bench/nanobench.cpp
+++ b/bench/nanobench.cpp
@@ -167,7 +167,8 @@ struct GPUTarget : public Target {
         return true;
     }
     bool init(SkImageInfo info, Benchmark* bench) override {
-        uint32_t flags = this->config.useDFText ? SkSurfaceProps::kUseDistanceFieldFonts_Flag : 0;
+        uint32_t flags = this->config.useDFText ? SkSurfaceProps::kUseDeviceIndependentFonts_Flag :
+                                                  0;
         SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
         this->surface.reset(SkSurface::NewRenderTarget(gGrFactory->get(this->config.ctxType),
                                                          SkSurface::kNo_Budgeted, info,