Revert of sRGB support in Ganesh. Several pieces:

src/effects/gradients/SkGradientShader.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Sk4fLinearGradient.h"
 #include "SkGradientShaderPriv.h"
 #include "SkLinearGradient.h"
 #include "SkRadialGradient.h"
 #include "SkTwoPointConicalGradient.h"
 #include "SkSweepGradient.h"
 
-#include "GrContext.h"
-
 void SkGradientShaderBase::Descriptor::flatten(SkWriteBuffer& buffer) const {
     buffer.writeColorArray(fColors, fCount);
     if (fPos) {
         buffer.writeBool(true);
         buffer.writeScalarArray(fPos, fCount);
     } else {
         buffer.writeBool(false);
     }
     buffer.write32(fTileMode);
     buffer.write32(fGradFlags);
@@ skipping 1085 matching lines @@
         // doesn't matter how this is set, just be consistent because it is part of the effect key.
         fPremulType = kBeforeInterp_PremulType;
         SkBitmap bitmap;
         shader.getGradientTableBitmap(&bitmap);
 
         GrTextureStripAtlas::Desc desc;
         desc.fWidth  = bitmap.width();
         desc.fHeight = 32;
         desc.fRowHeight = bitmap.height();
         desc.fContext = ctx;
-        desc.fConfig = SkImageInfo2GrPixelConfig(bitmap.info(), *ctx->caps());
+        desc.fConfig = SkImageInfo2GrPixelConfig(bitmap.info());
         fAtlas = GrTextureStripAtlas::GetAtlas(desc);
         SkASSERT(fAtlas);
 
         // We always filter the gradient table. Each table is one row of a texture, always y-clamp.
         GrTextureParams params;
         params.setFilterMode(GrTextureParams::kBilerp_FilterMode);
         params.setTileModeX(tileMode);
 
         fRow = fAtlas->lockRow(bitmap);
         if (-1 != fRow) {
@@ skipping 75 matching lines @@
             (*stops)[i] = stop;
             stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f;
         }
     }
     *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount));
 
     return outColors;
 }
 
 #endif