Turn ContextInfos returned by GrContextFactory into structs.

tests/ApplyGammaTest.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <initializer_list>
 #include "Test.h"
 
@@ skipping 50 matching lines @@
             uint8_t expectedComponent = SkScalarRoundToInt((lower + upper) * 127.5f);
             expectedColor |= expectedComponent << (c * 8);
         }
 
         *expected = expectedColor;
         return result;
     }
 }
 
 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ApplyGamma, reporter, ctxInfo) {
-    GrContext* context = ctxInfo.fGrContext;
+    GrContext* context = ctxInfo.grContext();
     static const int kW = 10;
     static const int kH = 10;
     static const size_t kRowBytes = sizeof(uint32_t) * kW;
 
     GrSurfaceDesc baseDesc;
     baseDesc.fConfig = kRGBA_8888_GrPixelConfig;
     baseDesc.fWidth = kW;
     baseDesc.fHeight = kH;
 
     SkAutoTMalloc<uint32_t> srcPixels(kW * kH);
@@ skipping 65 matching lines @@
                                 break;
                             }
                         }
                     }
                 }
             }
         }
     }
 }
 #endif