sRGB support in Ganesh. Several pieces:

src/core/SkImageCacherator.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 "SkBitmapCache.h"
 #include "SkImage_Base.h"
@@ skipping 153 matching lines @@
         bitmap->reset();
         return false;
     }
 
     if (!bitmap->tryAllocPixels(fInfo)) {
         bitmap->reset();
         return false;
     }
 
     const uint32_t pixelOpsFlags = 0;
-    if (!tex->readPixels(0, 0, bitmap->width(), bitmap->height(), SkImageInfo2GrPixelConfig(fInfo),
+    if (!tex->readPixels(0, 0, bitmap->width(), bitmap->height(),
+                         SkImageInfo2GrPixelConfig(fInfo, *tex->getContext()->caps()),
                          bitmap->getPixels(), bitmap->rowBytes(), pixelOpsFlags)) {
         bitmap->reset();
         return false;
     }
 
     bitmap->pixelRef()->setImmutableWithID(fUniqueID);
     if (SkImage::kAllow_CachingHint == chint) {
         SkBitmapCache::Add(fUniqueID, *bitmap);
         if (client) {
             as_IB(client)->notifyAddedToCache();
@@ skipping 81 matching lines @@
     {
         ScopedGenerator generator(this);
         SkIRect subset = SkIRect::MakeXYWH(fOrigin.x(), fOrigin.y(), fInfo.width(), fInfo.height());
         if (GrTexture* tex = generator->generateTexture(ctx, &subset)) {
             SK_HISTOGRAM_ENUMERATION("LockTexturePath", kNative_LockTexturePath,
                                      kLockTexturePathCount);
             return set_key_and_return(tex, key);
         }
     }
 
-    const GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(fInfo);
+    const GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(fInfo, *ctx->caps());
 
     // 3. Ask the generator to return a compressed form that the GPU might support
     SkAutoTUnref<SkData> data(this->refEncoded(ctx));
     if (data) {
         GrTexture* tex = load_compressed_into_texture(ctx, data, desc);
         if (tex) {
             SK_HISTOGRAM_ENUMERATION("LockTexturePath", kCompressed_LockTexturePath,
                                      kLockTexturePathCount);
             return set_key_and_return(tex, key);
         }
@@ skipping 45 matching lines @@
 }
 
 #else
 
 GrTexture* SkImageCacherator::lockAsTexture(GrContext* ctx, const GrTextureParams&,
                                             const SkImage* client, SkImage::CachingHint) {
     return nullptr;
 }
 
 #endif