Move common_param_traits and webkit_param_traits to content/public/common.

content/content_common.gypi

Index: content/content_common.gypi
===================================================================
--- content/content_common.gypi	(revision 106741)
+++ content/content_common.gypi	(working copy)
@@ -70,8 +70,6 @@
     'common/cloud_print_class_mac.h',
     'common/cloud_print_class_mac.mm',
     'common/clipboard_messages.h',
-    'common/common_param_traits.cc',
-    'common/common_param_traits.h',
     'common/content_message_generator.cc',
     'common/content_message_generator.h',
     'common/content_export.h',
@@ -242,15 +240,17 @@
     'common/webblobregistry_impl.cc',
     'common/webblobregistry_impl.h',
     'common/webblob_messages.h',
-    'common/webkit_param_traits.cc',
-    'common/webkit_param_traits.h',
     'common/webmessageportchannel_impl.cc',
     'common/webmessageportchannel_impl.h',
     'common/worker_messages.h',
+    'public/common/common_param_traits.cc',
+    'public/common/common_param_traits.h',
     'public/common/content_client.cc',
     'public/common/content_client.h',
     'public/common/window_container_type.cc',
     'public/common/window_container_type.h',
+    'public/common/webkit_param_traits.cc',
+    'public/common/webkit_param_traits.h',
   ],
   'conditions': [
     ['OS!="win"', {