Connect Sky and Ganesh in SkyShell

sky/shell/gpu/ganesh_context.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sky/shell/gpu/ganesh_context.h"
 
 #include "base/logging.h"
 #include "third_party/skia/include/gpu/gl/GrGLInterface.h"
 #include "ui/gl/gl_bindings_skia_in_process.h"
 
@@ skipping 12 matching lines @@
 }  // namespace
 
 GaneshContext::GaneshContext(scoped_refptr<gfx::GLContext> gl_context)
     : gl_context_(gl_context) {
   skia::RefPtr<GrGLInterface> interface =
       skia::AdoptRef(gfx::CreateInProcessSkiaGLBinding());
   DCHECK(interface);
 
   gr_context_ = skia::AdoptRef(GrContext::Create(
       kOpenGL_GrBackend, reinterpret_cast<GrBackendContext>(interface.get())));
-  DCHECK(gr_context_);
+  DCHECK(gr_context_) << "Failed to create GrContext.";
   gr_context_->setResourceCacheLimits(kMaxGaneshResourceCacheCount,
                                       kMaxGaneshResourceCacheBytes);
 }
 
 GaneshContext::~GaneshContext() {
 }
 
 }  // namespace shell
 }  // namespace sky