Change some internal path names.

This is mostly to sync up with some changes from Google's internal
repositories; it does not affect the open-source distribution in itself.

snappy-sinksource.h

@@ -26,12 +26,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef UTIL_SNAPPY_SNAPPY_SINKSOURCE_H_
-#define UTIL_SNAPPY_SNAPPY_SINKSOURCE_H_
+#ifndef THIRD_PARTY_SNAPPY_SNAPPY_SINKSOURCE_H_
+#define THIRD_PARTY_SNAPPY_SNAPPY_SINKSOURCE_H_
 
 #include <stddef.h>
 
-
 namespace snappy {
 
 // A Sink is an interface that consumes a sequence of bytes.
@@ -131,7 +130,6 @@ class UncheckedByteArraySink : public Sink {
   char* dest_;
 };
 
+}  // namespace snappy
 
-}
-
-#endif  // UTIL_SNAPPY_SNAPPY_SINKSOURCE_H_
+#endif  // THIRD_PARTY_SNAPPY_SNAPPY_SINKSOURCE_H_