Make unit tests use generic testcontext rather than glcontext

tools/gpu/GrContextFactory.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrContextFactory_DEFINED
 #define GrContextFactory_DEFINED
 
@@ skipping 10 matching lines @@
 
 class ContextInfo {
 public:
     ContextInfo() = default;
     ContextInfo& operator=(const ContextInfo&) = default;
 
     GrBackend backend() const { return fBackend; };
 
     GrContext* grContext() const { return fGrContext; }
 
+    TestContext* testContext() const { return fTestContext; }
+
     GLTestContext* glContext() const {
         SkASSERT(kOpenGL_GrBackend == fBackend);
         return static_cast<GLTestContext*>(fTestContext);
     }
 
 #ifdef SK_VULKAN
     VkTestContext* vkContext() const {
         SkASSERT(kVulkan_GrBackend == fBackend);
         return static_cast<VkTestContext*>(fTestContext);
     }
@@ skipping 45 matching lines @@
     /**
      * Options for GL context creation. For historical and testing reasons the options will default
      * to not using GL_NV_path_rendering extension  even when the driver supports it.
      */
     enum ContextOptions {
         kNone_ContextOptions                = 0x0,
         kEnableNVPR_ContextOptions          = 0x1,
         kRequireSRGBSupport_ContextOptions  = 0x2,
     };
 
+    static ContextType NativeContextTypeForBackend(GrBackend backend) {
+        switch (backend) {
+            case kOpenGL_GrBackend:
+                return kNativeGL_ContextType;
+            case kVulkan_GrBackend:
+                return kVulkan_ContextType;
+            default:
+                SkFAIL("Unknown backend");
+                return kNullGL_ContextType;
+        }
+    }
+
     static bool IsRenderingContext(ContextType type) {
         switch (type) {
             case kNullGL_ContextType:
             case kDebugGL_ContextType:
                 return false;
             default:
                 return true;
         }
     }
 
@@ skipping 59 matching lines @@
         TestContext*    fTestContext;
         GrContext*      fGrContext;
         bool            fAbandoned;
     };
     SkTArray<Context, true>         fContexts;
     SkAutoTDelete<GLTestContext>    fSentinelGLContext;
     const GrContextOptions          fGlobalOptions;
 };
 }  // namespace sk_gpu_test
 #endif