Don't clobber initial transform with SetMatrix.

tests/RecordTestUtils.h

+#ifndef RecordTestUtils_DEFINED
+#define RecordTestUtils_DEFINED
+
+#include "SkRecord.h"
+#include "SkRecords.h"
+
+// If the command we're reading is a U, set ptr to it, otherwise set it to NULL.
+template <typename U>
+struct ReadAs {
+    ReadAs() : ptr(NULL), type(SkRecords::Type(~0)) {}
+
+    const U* ptr;
+    SkRecords::Type type;
+
+    void operator()(const U& r) { ptr = &r; type = U::kType; }
+
+    template <typename T>
+    void operator()(const T&) { type = U::kType; }
+};
+
+// Assert that the ith command in record is of type T, and return it.
+template <typename T>
+static const T* assert_type(skiatest::Reporter* r, const SkRecord& record, unsigned index) {
+    ReadAs<T> reader;
+    record.visit<void>(index, reader);
+    REPORTER_ASSERT(r, T::kType == reader.type);
+    REPORTER_ASSERT(r, NULL != reader.ptr);
+    return reader.ptr;
+}
+
+#endif//RecordTestUtils_DEFINED