Move Pickle to base namespace.

chromecast/common/media/cma_param_traits.h

Index: chromecast/common/media/cma_param_traits.h
diff --git a/chromecast/common/media/cma_param_traits.h b/chromecast/common/media/cma_param_traits.h
index 0bebac35c2af36ccfddb88dbe8fd1ef17ef51404..106012bed8b3ca9c91eaaa94f8a3dd0e82825334 100644
--- a/chromecast/common/media/cma_param_traits.h
+++ b/chromecast/common/media/cma_param_traits.h
@@ -18,7 +18,7 @@ template <>
 struct ParamTraits<media::AudioDecoderConfig> {
   typedef media::AudioDecoderConfig 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);
 };
 
@@ -26,7 +26,7 @@ template <>
 struct ParamTraits<media::VideoDecoderConfig> {
   typedef media::VideoDecoderConfig 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);
 };