Change most uses of Pickle to base::Pickle

content/browser/download/base_file.cc

Index: content/browser/download/base_file.cc
diff --git a/content/browser/download/base_file.cc b/content/browser/download/base_file.cc
index 62ffe57fea2dd9ab6d0f9d8f3b3ce3b06605eb3e..f9b80155018d4a00aa2a6df90bcb32b3666c2672 100644
--- a/content/browser/download/base_file.cc
+++ b/content/browser/download/base_file.cc
@@ -47,8 +47,9 @@ BaseFile::BaseFile(const base::FilePath& full_path,
     secure_hash_.reset(crypto::SecureHash::Create(crypto::SecureHash::SHA256));
     if ((bytes_so_far_ > 0) &&  // Not starting at the beginning.
         (!IsEmptyHash(hash_state_bytes))) {
-      Pickle hash_state(hash_state_bytes.c_str(), hash_state_bytes.size());
-      PickleIterator data_iterator(hash_state);
+      base::Pickle hash_state(hash_state_bytes.c_str(),
+                              hash_state_bytes.size());
+      base::PickleIterator data_iterator(hash_state);
       secure_hash_->Deserialize(&data_iterator);
     }
   }
@@ -225,7 +226,7 @@ std::string BaseFile::GetHashState() {
   if (!calculate_hash_)
     return std::string();
 
-  Pickle hash_state;
+  base::Pickle hash_state;
   if (!secure_hash_->Serialize(&hash_state))
     return std::string();