C++ bindings: A struct's Deserialize() now does validation before deserializing.

mojo/public/cpp/bindings/tests/buffer_unittest.cc

Index: mojo/public/cpp/bindings/tests/buffer_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/buffer_unittest.cc b/mojo/public/cpp/bindings/tests/buffer_unittest.cc
index 317a2a516025a237b2e6246163e41f968ba9d09e..96acdd90c8ef3e8ce9f55e8452c9b2ce3e4b2de9 100644
--- a/mojo/public/cpp/bindings/tests/buffer_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/buffer_unittest.cc
@@ -21,6 +21,14 @@ bool IsZero(void* p_buf, size_t size) {
   return true;
 }
 
+// Tests that you can create a FixedBuffer whose underlying buffer size is not
+// a multiple of 8.
+TEST(FixedBufferTest, UnAlignedBufferSized) {
+  char char_buf[10] = {};
+  internal::FixedBuffer fixed_buf;
+  fixed_buf.Initialize(char_buf, sizeof(char_buf));
+}
+
 // Tests that FixedBuffer allocates memory aligned to 8 byte boundaries.
 TEST(FixedBufferTest, Alignment) {
   internal::FixedBufferForTesting buf(internal::Align(10) * 2);