Add SkMiniData.

tests/MiniDataTest.cpp

Index: tests/MiniDataTest.cpp
diff --git a/tests/MiniDataTest.cpp b/tests/MiniDataTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..cb656b3e5a7e847000e34e735d80742e0cc96964
--- /dev/null
+++ b/tests/MiniDataTest.cpp
@@ -0,0 +1,16 @@
+#include "SkMiniData.h"
+#include "Test.h"
+
+DEF_TEST(MiniData, r) {
+    static const char* s = "abcdefghijklmnopqrstuvwxyz";
+
+    for (size_t len = 0; len <= 26; len++) {
+        SkMiniData md(s, len);
+        REPORTER_ASSERT(r, md.len() == len);
+        REPORTER_ASSERT(r, 0 == memcmp(md.data(), s, len));
+
+        SkMiniData copy(md);
+        REPORTER_ASSERT(r, copy.len() == len);
+        REPORTER_ASSERT(r, 0 == memcmp(copy.data(), s, len));
+    }
+}