Move Pickle to base namespace.

chrome/browser/password_manager/native_backend_kwallet_x.h

Index: chrome/browser/password_manager/native_backend_kwallet_x.h
diff --git a/chrome/browser/password_manager/native_backend_kwallet_x.h b/chrome/browser/password_manager/native_backend_kwallet_x.h
index 6227269e5274b61ea7e867219aee7d35ce66c529..e4e0b1bbce7f10781c680586db4e4de757d3da7e 100644
--- a/chrome/browser/password_manager/native_backend_kwallet_x.h
+++ b/chrome/browser/password_manager/native_backend_kwallet_x.h
@@ -16,14 +16,13 @@
 #include "chrome/browser/password_manager/password_store_x.h"
 #include "chrome/browser/profiles/profile.h"
 
-class Pickle;
-class PickleIterator;
-
 namespace autofill {
 struct PasswordForm;
 }
 
 namespace base {
+class Pickle;
+class PickleIterator;
 class WaitableEvent;
 }
 
@@ -71,7 +70,7 @@ class NativeBackendKWallet : public PasswordStoreX::NativeBackend {
   // Deserializes a list of PasswordForms from the wallet.
   static ScopedVector<autofill::PasswordForm> DeserializeValue(
       const std::string& signon_realm,
-      const Pickle& pickle);
+      const base::Pickle& pickle);
 
  private:
   enum InitResult {