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

tests/TestConfigParsing.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCommonFlagsConfig.h"
 #include "SkColorSpace.h"
 #include "Test.h"
@@ skipping 103 matching lines @@
     REPORTER_ASSERT(reporter, configs[14]->asConfigGpu()->getUseDIText());
     REPORTER_ASSERT(reporter, configs[15]->asConfigGpu()->getSamples() == 4);
     REPORTER_ASSERT(reporter, configs[15]->asConfigGpu()->getUseNVPR());
     REPORTER_ASSERT(reporter, configs[15]->asConfigGpu()->getUseDIText());
     REPORTER_ASSERT(reporter, !configs[16]->asConfigGpu());
     REPORTER_ASSERT(reporter, !configs[17]->asConfigGpu());
     REPORTER_ASSERT(reporter, !configs[18]->asConfigGpu());
     REPORTER_ASSERT(reporter, !configs[19]->asConfigGpu());
     REPORTER_ASSERT(reporter, !configs[24]->asConfigGpu());
     REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorType() == kRGBA_F16_SkColorType);
-    REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorSpace() == nullptr);
+    REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorSpace() == srgbColorSpace.get());
     REPORTER_ASSERT(reporter, configs[26]->asConfigGpu()->getColorType() == kN32_SkColorType);
     REPORTER_ASSERT(reporter, configs[26]->asConfigGpu()->getColorSpace() == srgbColorSpace.get());
 
 #if SK_ANGLE
 #ifdef SK_BUILD_FOR_WIN
     REPORTER_ASSERT(reporter, configs[20]->asConfigGpu());
 #else
     REPORTER_ASSERT(reporter, !configs[20]->asConfigGpu());
 #endif
     REPORTER_ASSERT(reporter, configs[21]->asConfigGpu());
@@ skipping 222 matching lines @@
             REPORTER_ASSERT(reporter,
                             configs[i]->getViaParts()[j].equals(expectedConfigs[i].vias[j]));
         }
     }
 #if SK_SUPPORT_GPU
     REPORTER_ASSERT(reporter, configs[0]->asConfigGpu());
     REPORTER_ASSERT(reporter, !configs[1]->asConfigGpu());
     REPORTER_ASSERT(reporter, !configs[2]->asConfigGpu());
 #endif
 }