Revert of sRGB support in Ganesh. Several pieces:

src/core/SkImageCacherator.cpp

Index: src/core/SkImageCacherator.cpp
diff --git a/src/core/SkImageCacherator.cpp b/src/core/SkImageCacherator.cpp
index bb389e986b4e4d831ddd5d66bead22324729b824..12c09cbe0ae7107658350379635c5881eea9a010 100644
--- a/src/core/SkImageCacherator.cpp
+++ b/src/core/SkImageCacherator.cpp
@@ -171,8 +171,7 @@
     }
 
     const uint32_t pixelOpsFlags = 0;
-    if (!tex->readPixels(0, 0, bitmap->width(), bitmap->height(),
-                         SkImageInfo2GrPixelConfig(fInfo, *tex->getContext()->caps()),
+    if (!tex->readPixels(0, 0, bitmap->width(), bitmap->height(), SkImageInfo2GrPixelConfig(fInfo),
                          bitmap->getPixels(), bitmap->rowBytes(), pixelOpsFlags)) {
         bitmap->reset();
         return false;
@@ -274,7 +273,7 @@
         }
     }
 
-    const GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(fInfo, *ctx->caps());
+    const GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(fInfo);
 
     // 3. Ask the generator to return a compressed form that the GPU might support
     SkAutoTUnref<SkData> data(this->refEncoded(ctx));