Always supply a color space (sRGB for now) with F16

dm/DM.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 844 matching lines @@
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
     SINK("hwui",           HWUISink);
 #endif
 
     if (FLAGS_cpu) {
         auto srgbColorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
 
         SINK("565",  RasterSink, kRGB_565_SkColorType);
         SINK("8888", RasterSink, kN32_SkColorType);
         SINK("srgb", RasterSink, kN32_SkColorType, srgbColorSpace);
-        SINK("f16",  RasterSink, kRGBA_F16_SkColorType);
+        SINK("f16",  RasterSink, kRGBA_F16_SkColorType, srgbColorSpace);
         SINK("pdf",  PDFSink);
         SINK("skp",  SKPSink);
         SINK("svg",  SVGSink);
         SINK("null", NullSink);
         SINK("xps",  XPSSink);
         SINK("pdfa", PDFSink, true);
     }
 #undef SINK
     return nullptr;
 }
@@ skipping 555 matching lines @@
 #endif
 }
 } // namespace skiatest
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif