Move Pickle to base namespace.

content/common/resource_messages.h

Index: content/common/resource_messages.h
diff --git a/content/common/resource_messages.h b/content/common/resource_messages.h
index 1a0b31205b5ed03d46e363b602859880c3924a0a..4a2c6fddf77a2a638b59b661987581d646204067 100644
--- a/content/common/resource_messages.h
+++ b/content/common/resource_messages.h
@@ -36,7 +36,7 @@ template <>
 struct ParamTraits<scoped_refptr<net::HttpResponseHeaders> > {
   typedef scoped_refptr<net::HttpResponseHeaders> 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);
 };
 
@@ -44,7 +44,7 @@ template <>
 struct CONTENT_EXPORT ParamTraits<storage::DataElement> {
   typedef storage::DataElement 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);
 };
 
@@ -52,7 +52,7 @@ template <>
 struct ParamTraits<scoped_refptr<content::ResourceDevToolsInfo> > {
   typedef scoped_refptr<content::ResourceDevToolsInfo> 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);
 };
 
@@ -60,7 +60,7 @@ template <>
 struct ParamTraits<net::LoadTimingInfo> {
   typedef net::LoadTimingInfo 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);
 };
 
@@ -68,7 +68,7 @@ template <>
 struct ParamTraits<scoped_refptr<content::ResourceRequestBody> > {
   typedef scoped_refptr<content::ResourceRequestBody> 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);
 };