Support sRGB dsts in opt code

dm/DMSrcSink.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef DMSrcSink_DEFINED
 #define DMSrcSink_DEFINED
 
@@ skipping 197 matching lines @@
 class ColorCodecSrc : public Src {
 public:
     enum Mode {
         // Mimic legacy behavior and apply no color correction.
         kBaseline_Mode,
 
         // Color correct images into a specific dst color space.  If you happen to have this
         // monitor, you're in luck!  The unmarked outputs of this test should display
         // correctly on this monitor in the Chrome browser.  If not, it's useful to know
         // that this monitor has a profile that is fairly similar to Adobe RGB.
-        // TODO (msarett): Should we add a new test with a new monitor and verify that outputs
-        //                 look identical on two different dsts?
         kDst_HPZR30w_Mode,
 
+        kDst_sRGB_Mode,
+
 #if defined(SK_TEST_QCMS)
         // Use QCMS for color correction.
         kQCMS_HPZR30w_Mode,
 #endif
     };
 
     ColorCodecSrc(Path, Mode);
 
     Error draw(SkCanvas*) const override;
     SkISize size() const override;
@@ skipping 188 matching lines @@
 
 class ViaMojo : public Via {
 public:
     explicit ViaMojo(Sink* sink) : Via(sink) {}
     Error draw(const Src&, SkBitmap*, SkWStream*, SkString*) const override;
 };
 
 }  // namespace DM
 
 #endif//DMSrcSink_DEFINED