Move Pickle to base namespace.

net/http/http_response_info.h

Index: net/http/http_response_info.h
diff --git a/net/http/http_response_info.h b/net/http/http_response_info.h
index b83bdbe20cefacea5af8554d82c713ea3a4f0edf..e6d5ba1e22f29c6eb4f633afb90a3b2cee5a3d7e 100644
--- a/net/http/http_response_info.h
+++ b/net/http/http_response_info.h
@@ -14,7 +14,9 @@
 #include "net/socket/next_proto.h"
 #include "net/ssl/ssl_info.h"
 
+namespace base {
 class Pickle;
+}
 
 namespace net {
 
@@ -52,10 +54,10 @@ class NET_EXPORT HttpResponseInfo {
   // that would prevent us from doing a bunch of forward declaration.
 
   // Initializes from the representation stored in the given pickle.
-  bool InitFromPickle(const Pickle& pickle, bool* response_truncated);
+  bool InitFromPickle(const base::Pickle& pickle, bool* response_truncated);
 
   // Call this method to persist the response info.
-  void Persist(Pickle* pickle,
+  void Persist(base::Pickle* pickle,
                bool skip_transient_headers,
                bool response_truncated) const;