Fix some minor typos: psuedo -> pseudo

components/rappor/byte_vector_utils.h

Index: components/rappor/byte_vector_utils.h
diff --git a/components/rappor/byte_vector_utils.h b/components/rappor/byte_vector_utils.h
index 3f8eb27780558537d70b28706cfab29d58c0f2ab..3bc0936154b8dc1a8444f2ad5c639cc47d98fc08 100644
--- a/components/rappor/byte_vector_utils.h
+++ b/components/rappor/byte_vector_utils.h
@@ -62,7 +62,7 @@ class ByteVectorGenerator {
   DISALLOW_COPY_AND_ASSIGN(ByteVectorGenerator);
 };
 
-// A ByteVectorGenerator that uses a psuedo-random function to generate a
+// A ByteVectorGenerator that uses a pseudo-random function to generate a
 // deterministically random bits.  This class only implements a single request
 // from HMAC_DRBG and streams up to 2^19 bits from that request.
 // Ref: http://csrc.nist.gov/publications/nistpubs/800-90A/SP800-90A.pdf