Move Pickle to base namespace.

content/common/input/input_param_traits.h

Index: content/common/input/input_param_traits.h
diff --git a/content/common/input/input_param_traits.h b/content/common/input/input_param_traits.h
index 11724337a8280cd21d6c5b0ebed3a0d5df1e1c32..9f5b1cec36c720b436cbb7cee86dac8d2544d861 100644
--- a/content/common/input/input_param_traits.h
+++ b/content/common/input/input_param_traits.h
@@ -19,7 +19,7 @@ template <>
 struct CONTENT_EXPORT ParamTraits<content::ScopedWebInputEvent> {
   typedef content::ScopedWebInputEvent param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
+  static bool Read(const Message* m, base::PickleIterator* iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
@@ -27,7 +27,7 @@ template<>
 struct CONTENT_EXPORT ParamTraits<content::SyntheticGesturePacket> {
   typedef content::SyntheticGesturePacket param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
+  static bool Read(const Message* m, base::PickleIterator* iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };