Modify QCMS test to match use by Chrome

dm/DMSrcSink.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 "DMSrcSink.h"
 #include "Resources.h"
 #include "SkAndroidCodec.h"
@@ skipping 903 matching lines @@
             SkAutoTCallVProc<qcms_profile, qcms_profile_release>
                     srcSpace(qcms_profile_from_memory(srcData->data(), srcData->size()));
             if (!srcSpace) {
                 return Error::Nonfatal(SkStringPrintf("QCMS cannot create profile for %s.\n",
                                        fPath.c_str()));
             }
 
             SkAutoTCallVProc<qcms_profile, qcms_profile_release>
                     dstSpace(qcms_profile_from_memory(dstData->data(), dstData->size()));
             SkASSERT(dstSpace);
+
+            // Optimizes conversion by precomputing the inverse transformation to dst.  Also
+            // causes QCMS to use a completely different codepath.  This is how Chrome uses QCMS.
+            qcms_profile_precache_output_transform(dstSpace);
             SkAutoTCallVProc<qcms_transform, qcms_transform_release>
                     transform (qcms_transform_create(srcSpace, QCMS_DATA_RGBA_8, dstSpace,
                                                      QCMS_DATA_RGBA_8, QCMS_INTENT_PERCEPTUAL));
             if (!transform) {
                 return SkStringPrintf("QCMS cannot create transform for %s.\n", fPath.c_str());
             }
 
 #ifdef SK_PMCOLOR_IS_RGBA
             qcms_output_type outType = QCMS_OUTPUT_RGBX;
 #else
@@ skipping 605 matching lines @@
             skr.visit(i, drawsAsSingletonPictures);
         }
         sk_sp<SkPicture> macroPic(macroRec.finishRecordingAsPicture());
 
         canvas->drawPicture(macroPic);
         return check_against_reference(bitmap, src, fSink);
     });
 }
 
 }  // namespace DM