Move NaClModulesHandler to src/extensions

extensions/common/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 
 # GYP version: extensions/extensions.gyp:extensions_common
 source_set("common") {
   sources = [
     "api/messaging/message.h",
@@ skipping 206 matching lines @@
       "api/sockets/sockets_manifest_handler.cc",
       "api/sockets/sockets_manifest_handler.h",
       "api/sockets/sockets_manifest_permission.cc",
       "api/sockets/sockets_manifest_permission.h",
       "extension_api.cc",
       "manifest_handlers/externally_connectable.cc",
       "manifest_handlers/externally_connectable.h",
     ]
   }
 
+  if (enable_nacl) {
+    deps += [
+      #'<(DEPTH)/components/nacl.gyp:nacl_common',  TODO(GYP)
+    ]
+    sources += [
+      "manifest_handlers/nacl_modules_handler.cc",
+      "manifest_handlers/nacl_modules_handler.h",
+    ]
+  }
+
   if (is_win) {
     cflags = [
       "/wd4267", # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     ]
   }
 }