Fix crash in tests on valgrind bot

tests/SurfaceTest.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 "SkCanvas.h"
 #include "SkRRect.h"
 #include "SkSurface.h"
@@ skipping 225 matching lines @@
     TestSurfaceCopyOnWrite(reporter, kPicture_SurfaceType, NULL);
     TestSurfaceWritableAfterSnapshotRelease(reporter, kRaster_SurfaceType, NULL);
     TestSurfaceWritableAfterSnapshotRelease(reporter, kPicture_SurfaceType, NULL);
     TestSurfaceNoCanvas(reporter, kRaster_SurfaceType, NULL, SkSurface::kDiscard_ContentChangeMode);
     TestSurfaceNoCanvas(reporter, kRaster_SurfaceType, NULL, SkSurface::kRetain_ContentChangeMode);
 #if SK_SUPPORT_GPU
     TestGetTexture(reporter, kRaster_SurfaceType, NULL);
     TestGetTexture(reporter, kPicture_SurfaceType, NULL);
     if (NULL != factory) {
         GrContext* context = factory->get(GrContextFactory::kNative_GLContextType);
-        Test_crbug263329(reporter, context);
-        TestSurfaceCopyOnWrite(reporter, kGpu_SurfaceType, context);
-        TestSurfaceWritableAfterSnapshotRelease(reporter, kGpu_SurfaceType, context);
-        TestSurfaceNoCanvas(reporter, kGpu_SurfaceType, context, SkSurface::kDiscard_ContentChangeMode);
-        TestSurfaceNoCanvas(reporter, kGpu_SurfaceType, context, SkSurface::kRetain_ContentChangeMode);
-        TestGetTexture(reporter, kGpu_SurfaceType, context);
+        if (NULL != context) {
+            Test_crbug263329(reporter, context);
+            TestSurfaceCopyOnWrite(reporter, kGpu_SurfaceType, context);
+            TestSurfaceWritableAfterSnapshotRelease(reporter, kGpu_SurfaceType, context);
+            TestSurfaceNoCanvas(reporter, kGpu_SurfaceType, context, SkSurface::kDiscard_ContentChangeMode);
+            TestSurfaceNoCanvas(reporter, kGpu_SurfaceType, context, SkSurface::kRetain_ContentChangeMode);
+            TestGetTexture(reporter, kGpu_SurfaceType, context);
+        }
     }
 #endif
 }
 
 #include "TestClassDef.h"
 DEFINE_GPUTESTCLASS("Surface", SurfaceTestClass, TestSurface)