Move each permission classes to its own files in extensions/permissions

chrome/common/extensions/extension_messages.cc

Index: chrome/common/extensions/extension_messages.cc
diff --git a/chrome/common/extensions/extension_messages.cc b/chrome/common/extensions/extension_messages.cc
index 829309700c993198afc67ebc8cb82b71a6eda109..4e6905e1ef911e93bb310d9b676fa7b03ee9659d 100644
--- a/chrome/common/extensions/extension_messages.cc
+++ b/chrome/common/extensions/extension_messages.cc
@@ -9,7 +9,9 @@
 #include "chrome/common/extensions/manifest.h"
 #include "content/public/common/common_param_traits.h"
 
+using extensions::APIPermission;
 using extensions::Extension;
+using extensions::PermissionSet;
 
 ExtensionMsg_Loaded_Params::ExtensionMsg_Loaded_Params()
     : location(Extension::INVALID),
@@ -42,7 +44,7 @@ scoped_refptr<Extension>
   }
 
   extension->SetActivePermissions(
-        new ExtensionPermissionSet(apis, explicit_hosts, scriptable_hosts));
+        new PermissionSet(apis, explicit_hosts, scriptable_hosts));
 
   return extension;
 }
@@ -118,22 +120,22 @@ void ParamTraits<URLPatternSet>::Log(const param_type& p, std::string* l) {
   LogParam(p.patterns(), l);
 }
 
-void ParamTraits<ExtensionAPIPermission::ID>::Write(
+void ParamTraits<APIPermission::ID>::Write(
     Message* m, const param_type& p) {
   WriteParam(m, static_cast<int>(p));
 }
 
-bool ParamTraits<ExtensionAPIPermission::ID>::Read(
+bool ParamTraits<APIPermission::ID>::Read(
     const Message* m, PickleIterator* iter, param_type* p) {
   int api_id = -2;
   if (!ReadParam(m, iter, &api_id))
     return false;
 
-  *p = static_cast<ExtensionAPIPermission::ID>(api_id);
+  *p = static_cast<APIPermission::ID>(api_id);
   return true;
 }
 
-void ParamTraits<ExtensionAPIPermission::ID>::Log(
+void ParamTraits<APIPermission::ID>::Log(
     const param_type& p, std::string* l) {
   LogParam(static_cast<int>(p), l);
 }