Change most uses of Pickle to base::Pickle

net/cert/signed_certificate_timestamp.cc

Index: net/cert/signed_certificate_timestamp.cc
diff --git a/net/cert/signed_certificate_timestamp.cc b/net/cert/signed_certificate_timestamp.cc
index 9c0f57d54549f1077818095b19636b718b6540b5..bbd36dff642d031e5d99aa78694417cefe80f8a8 100644
--- a/net/cert/signed_certificate_timestamp.cc
+++ b/net/cert/signed_certificate_timestamp.cc
@@ -32,7 +32,7 @@ SignedCertificateTimestamp::SignedCertificateTimestamp() {}
 
 SignedCertificateTimestamp::~SignedCertificateTimestamp() {}
 
-void SignedCertificateTimestamp::Persist(Pickle* pickle) {
+void SignedCertificateTimestamp::Persist(base::Pickle* pickle) {
   CHECK(pickle->WriteInt(version));
   CHECK(pickle->WriteString(log_id));
   CHECK(pickle->WriteInt64(timestamp.ToInternalValue()));
@@ -46,7 +46,7 @@ void SignedCertificateTimestamp::Persist(Pickle* pickle) {
 
 // static
 scoped_refptr<SignedCertificateTimestamp>
-SignedCertificateTimestamp::CreateFromPickle(PickleIterator* iter) {
+SignedCertificateTimestamp::CreateFromPickle(base::PickleIterator* iter) {
   int version;
   int64 timestamp;
   int hash_algorithm;