sRGB support in Ganesh. Several pieces:

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 7a6d9675382cea1f6d11d7fe9c0c88bca038f312..b0beee0b0b927b4a2465c885e207c67247980e01 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -193,6 +193,7 @@ GrRenderTarget* SkGpuDevice::CreateRenderTarget(
 
     SkColorType ct = origInfo.colorType();
     SkAlphaType at = origInfo.alphaType();
+    SkColorProfileType pt = origInfo.profileType();
     if (kRGB_565_SkColorType == ct) {
         at = kOpaque_SkAlphaType;  // force this setting
     } else if (ct != kBGRA_8888_SkColorType && ct != kRGBA_8888_SkColorType) {
@@ -202,7 +203,7 @@ GrRenderTarget* SkGpuDevice::CreateRenderTarget(
     if (kOpaque_SkAlphaType != at) {
         at = kPremul_SkAlphaType;  // force this setting
     }
-    const SkImageInfo info = SkImageInfo::Make(origInfo.width(), origInfo.height(), ct, at);
+    const SkImageInfo info = SkImageInfo::Make(origInfo.width(), origInfo.height(), ct, at, pt);
 
     GrSurfaceDesc desc;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;