sRGB support in Ganesh. Several pieces:

src/gpu/SkGrPixelRef.cpp

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 57 matching lines @@
         desc.fHeight = texture->height();
         srcRect = SkIRect::MakeWH(texture->width(), texture->height());
     } else {
         SkASSERT(SkIRect::MakeWH(texture->width(), texture->height()).contains(*subset));
         // Create a new texture that is the size of subset.
         desc.fWidth = subset->width();
         desc.fHeight = subset->height();
         srcRect = *subset;
     }
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
-    desc.fConfig = SkImageInfo2GrPixelConfig(dstCT, kPremul_SkAlphaType, dstPT);
+    desc.fConfig = SkImageInfo2GrPixelConfig(dstCT, kPremul_SkAlphaType, dstPT, *context->caps());
     desc.fTextureStorageAllocator = texture->desc().fTextureStorageAllocator;
     desc.fIsMipMapped = false;
 
     GrTexture* dst = context->textureProvider()->createTexture(desc, SkBudgeted::kNo, nullptr, 0);
     if (nullptr == dst) {
         return nullptr;
     }
 
     // Blink is relying on the above copy being sent to GL immediately in the case when the source
     // is a WebGL canvas backing store. We could have a TODO to remove this flush, but we have
@@ skipping 117 matching lines @@
         cachedBitmap.setImmutable();
         //Add to the cache
         SkBitmapCache::Add(this, bounds, cachedBitmap);
 
         dst->swap(cachedBitmap);
     }
 
     return true;
 
 }