Check for NULL GrContext in TessellatingPathRendererTests.

tests/TessellatingPathRendererTests.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 "SkPath.h"
+
 #if SK_SUPPORT_GPU
 #include "GrContextFactory.h"
 #include "GrTessellatingPathRenderer.h"
 #include "GrTest.h"
 #include "Test.h"
 
 /*
  * These tests pass by not crashing, hanging or asserting in Debug.
  */
 
@@ skipping 215 matching lines @@
 static void test_path(GrDrawTarget* dt, GrRenderTarget* rt, const SkPath& path) {
     GrTessellatingPathRenderer tess;
     GrPipelineBuilder pipelineBuilder;
     pipelineBuilder.setRenderTarget(rt);
     SkStrokeRec stroke(SkStrokeRec::kFill_InitStyle);
     tess.drawPath(dt, &pipelineBuilder, SK_ColorWHITE, SkMatrix::I(), path, stroke, false);
 }
 
 DEF_GPUTEST(TessellatingPathRendererTests, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
+    if (!context) {
+        return;
+    }
     GrSurfaceDesc desc;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = 800;
     desc.fHeight = 800;
     desc.fConfig = kSkia8888_GrPixelConfig;
     desc.fOrigin = kTopLeft_GrSurfaceOrigin;
     SkAutoTUnref<GrTexture> texture(
         context->refScratchTexture(desc, GrContext::kExact_ScratchTexMatch)
     );
     GrTestTarget tt;
@@ skipping 12 matching lines @@
     test_path(dt, rt, create_path_8());
     test_path(dt, rt, create_path_9());
     test_path(dt, rt, create_path_10());
     test_path(dt, rt, create_path_11());
     test_path(dt, rt, create_path_12());
     test_path(dt, rt, create_path_13());
     test_path(dt, rt, create_path_14());
     test_path(dt, rt, create_path_15());
 }
 #endif