Yet more ASAN fixes.

tests/ImageFilterTest.cpp

Index: tests/ImageFilterTest.cpp
diff --git a/tests/ImageFilterTest.cpp b/tests/ImageFilterTest.cpp
index 1fe9228fe4b858e9788669b8a282a264f3cb10f2..6c596156fe81f00312c32b4036270ea103006964 100644
--- a/tests/ImageFilterTest.cpp
+++ b/tests/ImageFilterTest.cpp
@@ -1141,6 +1141,9 @@ const SkSurfaceProps gProps = SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_Ini
 
 DEF_GPUTEST(ImageFilterCropRectGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
+    if (NULL == context) {
+        return;
+    }
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkSurface::kNo_Budgeted,
                                                          SkImageInfo::MakeN32Premul(100, 100),
@@ -1151,6 +1154,9 @@ DEF_GPUTEST(ImageFilterCropRectGPU, reporter, factory) {
 
 DEF_GPUTEST(HugeBlurImageFilterGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
+    if (NULL == context) {
+        return;
+    }
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkSurface::kNo_Budgeted,
                                                          SkImageInfo::MakeN32Premul(100, 100),
@@ -1161,6 +1167,9 @@ DEF_GPUTEST(HugeBlurImageFilterGPU, reporter, factory) {
 
 DEF_GPUTEST(XfermodeImageFilterCroppedInputGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
+    if (NULL == context) {
+        return;
+    }
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkSurface::kNo_Budgeted,
                                                          SkImageInfo::MakeN32Premul(1, 1),
@@ -1171,6 +1180,9 @@ DEF_GPUTEST(XfermodeImageFilterCroppedInputGPU, reporter, factory) {
 
 DEF_GPUTEST(TestNegativeBlurSigmaGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
+    if (NULL == context) {
+        return;
+    }
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkSurface::kNo_Budgeted,
                                                          SkImageInfo::MakeN32Premul(1, 1),