fix a leak

tests/SerializationTest.cpp

Index: tests/SerializationTest.cpp
diff --git a/tests/SerializationTest.cpp b/tests/SerializationTest.cpp
index 2ddd368433ba2e17fc0b02fbd78d3eb0cf3fc9ce..2f4f4a7eb2615060d4db763fea3c1fcbf058c0c3 100644
--- a/tests/SerializationTest.cpp
+++ b/tests/SerializationTest.cpp
@@ -378,11 +378,11 @@ DEF_TEST(Serialization, reporter) {
         SkWriteBuffer writer(SkWriteBuffer::kValidation_Flag);
         pict->flatten(writer);
         size_t size = writer.bytesWritten();
-        void* data = sk_malloc_throw(size);
-        writer.writeToMemory(data);
+        SkAutoTMalloc<unsigned char> data(size);
+        writer.writeToMemory(static_cast<void*>(data.get()));
 
         // Deserialize picture
-        SkValidatingReadBuffer reader(data, size);
+        SkValidatingReadBuffer reader(static_cast<void*>(data.get()), size);
         SkAutoTUnref<SkPicture> readPict(
             SkPicture::CreateFromBuffer(reader));
         REPORTER_ASSERT(reporter, NULL != readPict.get());