sRGB support in Ganesh. Several pieces:

example/HelloWorld.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 "HelloWorld.h"
@@ skipping 139 matching lines @@
 
     if (kRaster_DeviceType == fType) {
         // need to send the raster bits to the (gpu) window
         sk_sp<SkImage> snap = fSurface->makeImageSnapshot();
         SkPixmap pmap;
         if (snap->peekPixels(&pmap)) {
             const SkImageInfo& info = pmap.info();
             fRenderTarget->writePixels(0, 0, snap->width(), snap->height(),
                                             SkImageInfo2GrPixelConfig(info.colorType(),
                                                                     info.alphaType(),
-                                                                    info.profileType()),
+                                                                    info.profileType(),
+                                                                    *fContext->caps()),
                                             pmap.addr(),
                                             pmap.rowBytes(),
                                             GrContext::kFlushWrites_PixelOp);
         }
     }
     INHERITED::present();
 }
 
 void HelloWorldWindow::onSizeChange() {
     setUpRenderTarget();
 }
 
 bool HelloWorldWindow::onHandleChar(SkUnichar unichar) {
     if (' ' == unichar) {
         fType = fType == kRaster_DeviceType ? kGPU_DeviceType: kRaster_DeviceType;
         tearDownBackend();
         setUpBackend();
         this->setTitle();
         this->inval(NULL);
     }
     return true;
 }
 
 SkOSWindow* create_sk_window(void* hwnd, int , char** ) {
     return new HelloWorldWindow(hwnd);
 }