Remove unnecessary getColorSpace() API from SkCodec

bench/ColorCodecBench.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "ColorCodecBench.h"
 #include "Resources.h"
 #include "SkCodec.h"
@@ skipping 29 matching lines @@
 }
 
 void ColorCodecBench::decodeAndXform() {
     SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(fEncoded.get()));
 #ifdef SK_DEBUG
     const SkCodec::Result result =
 #endif
     codec->startScanlineDecode(fSrcInfo);
     SkASSERT(SkCodec::kSuccess == result);
 
-    sk_sp<SkColorSpace> srcSpace = sk_ref_sp(codec->getColorSpace());
+    sk_sp<SkColorSpace> srcSpace = sk_ref_sp(codec->getInfo().colorSpace());
     if (!srcSpace) {
         srcSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
     }
     std::unique_ptr<SkColorSpaceXform> xform = SkColorSpaceXform::New(srcSpace, fDstSpace);
     SkASSERT(xform);
 
     void* dst = fDst.get();
     for (int y = 0; y < fSrcInfo.height(); y++) {
 #ifdef SK_DEBUG
         const int rows =
@@ skipping 160 matching lines @@
 #endif
         {
             if (FLAGS_xform_only) {
                 this->xformOnly();
             } else {
                 this->decodeAndXform();
             }
         }
     }
 }