Add NewRGB() with float gamma to SkColorSpace public API

src/codec/SkPngCodec.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 "SkBitmap.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
-#include "SkColorSpace_Base.h"
+#include "SkColorSpace.h"
 #include "SkColorTable.h"
 #include "SkMath.h"
 #include "SkOpts.h"
 #include "SkPngCodec.h"
 #include "SkPoint3.h"
 #include "SkSize.h"
 #include "SkStream.h"
 #include "SkSwizzler.h"
 #include "SkTemplates.h"
 #include "SkUtils.h"
@@ skipping 358 matching lines @@
         if (!primaries.toXYZD50(&toXYZD50)) {
             toXYZD50.set3x3RowMajorf(gSRGB_toXYZD50);
         }
 
         if (PNG_INFO_gAMA == png_get_gAMA_fixed(png_ptr, info_ptr, &gamma)) {
             float value = png_inverted_fixed_point_to_float(gamma);
             gammas[0] = value;
             gammas[1] = value;
             gammas[2] = value;
 
-            return SkColorSpace_Base::NewRGB(gammas, toXYZD50);
+            return SkColorSpace::NewRGB(gammas, toXYZD50);
         }
 
         // Default to sRGB gamma if the image has color space information,
         // but does not specify gamma.
         return SkColorSpace::NewRGB(SkColorSpace::kSRGB_RenderTargetGamma, toXYZD50);
     }
 
     // Last, check for gamma.
     if (PNG_INFO_gAMA == png_get_gAMA_fixed(png_ptr, info_ptr, &gamma)) {
 
         // Set the gammas.
         float value = png_inverted_fixed_point_to_float(gamma);
         gammas[0] = value;
         gammas[1] = value;
         gammas[2] = value;
 
         // Since there is no cHRM, we will guess sRGB gamut.
         SkMatrix44 toXYZD50(SkMatrix44::kUninitialized_Constructor);
         toXYZD50.set3x3RowMajorf(gSRGB_toXYZD50);
 
-        return SkColorSpace_Base::NewRGB(gammas, toXYZD50);
+        return SkColorSpace::NewRGB(gammas, toXYZD50);
     }
 
 #endif // LIBPNG >= 1.6
 
     // Report that there is no color space information in the PNG.  SkPngCodec is currently
     // implemented to guess sRGB in this case.
     return nullptr;
 }
 
 void SkPngCodec::allocateStorage(const SkImageInfo& dstInfo) {
@@ skipping 837 matching lines @@
     SkCodec* outCodec = nullptr;
     if (read_header(streamDeleter.get(), chunkReader, &outCodec, nullptr, nullptr)) {
         // Codec has taken ownership of the stream.
         SkASSERT(outCodec);
         streamDeleter.release();
         return outCodec;
     }
 
     return nullptr;
 }