Turn ContextInfos returned by GrContextFactory into structs.

tests/GrSurfaceTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTypes.h"
 
 #if SK_SUPPORT_GPU
 
 #include "GrContext.h"
 #include "GrGpu.h"
 #include "GrRenderTarget.h"
 #include "GrTexture.h"
 #include "GrSurfacePriv.h"
 #include "Test.h"
 
 // Tests that GrSurface::asTexture(), GrSurface::asRenderTarget(), and static upcasting of texture
 // and render targets to GrSurface all work as expected.
 DEF_GPUTEST_FOR_NULLGL_CONTEXT(GrSurface, reporter, ctxInfo) {
-    GrContext* context = ctxInfo.fGrContext;
+    GrContext* context = ctxInfo.grContext();
     GrSurfaceDesc desc;
     desc.fConfig = kSkia8888_GrPixelConfig;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = 256;
     desc.fHeight = 256;
     desc.fSampleCnt = 0;
     GrSurface* texRT1 = context->textureProvider()->createTexture(
             desc, SkBudgeted::kNo, nullptr, 0);
 
     REPORTER_ASSERT(reporter, texRT1 == texRT1->asRenderTarget());
@@ skipping 32 matching lines @@
     REPORTER_ASSERT(reporter, static_cast<GrSurface*>(texRT2->asRenderTarget()) ==
                     static_cast<GrSurface*>(texRT2->asTexture()));
 
     texRT1->unref();
     texRT2->unref();
     tex1->unref();
     context->getGpu()->deleteTestingOnlyBackendTexture(backendTex);
 }
 
 #endif