Change most uses of Pickle to base::Pickle

net/cert/signed_certificate_timestamp_unittest.cc

Index: net/cert/signed_certificate_timestamp_unittest.cc
diff --git a/net/cert/signed_certificate_timestamp_unittest.cc b/net/cert/signed_certificate_timestamp_unittest.cc
index 79f46214a98ec9452bc5384d7b2621363ee63998..90b4ab740e3851897982429d45015a61a65d9bc9 100644
--- a/net/cert/signed_certificate_timestamp_unittest.cc
+++ b/net/cert/signed_certificate_timestamp_unittest.cc
@@ -31,10 +31,10 @@ class SignedCertificateTimestampTest : public ::testing::Test {
 };
 
 TEST_F(SignedCertificateTimestampTest, PicklesAndUnpickles) {
-  Pickle pickle;
+  base::Pickle pickle;
 
   sample_sct_->Persist(&pickle);
-  PickleIterator iter(pickle);
+  base::PickleIterator iter(pickle);
 
   scoped_refptr<SignedCertificateTimestamp> unpickled_sct(
       SignedCertificateTimestamp::CreateFromPickle(&iter));