Change most uses of Pickle to base::Pickle

net/disk_cache/simple/simple_index_unittest.cc

Index: net/disk_cache/simple/simple_index_unittest.cc
diff --git a/net/disk_cache/simple/simple_index_unittest.cc b/net/disk_cache/simple/simple_index_unittest.cc
index a74cb108d120d4b4daf2fb704828fdb96660a954..3741070d4df4eaa2b025d82e8d4f62c96eff7902 100644
--- a/net/disk_cache/simple/simple_index_unittest.cc
+++ b/net/disk_cache/simple/simple_index_unittest.cc
@@ -188,10 +188,10 @@ TEST_F(EntryMetadataTest, Basics) {
 TEST_F(EntryMetadataTest, Serialize) {
   EntryMetadata entry_metadata = NewEntryMetadataWithValues();
 
-  Pickle pickle;
+  base::Pickle pickle;
   entry_metadata.Serialize(&pickle);
 
-  PickleIterator it(pickle);
+  base::PickleIterator it(pickle);
   EntryMetadata new_entry_metadata;
   new_entry_metadata.Deserialize(&it);
   CheckEntryMetadataValues(new_entry_metadata);