Extensions: Split the constants from the extensions_common target into its own extensions_common_co…

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")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 mojom("mojo") {
   sources = [
     "stash.mojom",
   ]
 }
 
+# GYP version: extensions/extensions.gyp:extensions_common_constants
+source_set("common_constants") {
+  sources = [
+    "constants.cc",
+    "constants.h",
+  ]
+
+  if (is_win) {
+    cflags = [
+      "/wd4267", # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    ]
+  }
+}
+
 # GYP version: extensions/extensions.gyp:extensions_common
 source_set("common") {
   sources = [
     "api/messaging/message.h",
     "api/bluetooth/bluetooth_manifest_data.cc",
     "api/bluetooth/bluetooth_manifest_data.h",
     "api/bluetooth/bluetooth_manifest_handler.cc",
     "api/bluetooth/bluetooth_manifest_handler.h",
     "api/bluetooth/bluetooth_manifest_permission.cc",
     "api/bluetooth/bluetooth_manifest_permission.h",
     "api/sockets/sockets_manifest_data.cc",
     "api/sockets/sockets_manifest_data.h",
     "api/sockets/sockets_manifest_handler.cc",
     "api/sockets/sockets_manifest_handler.h",
     "api/sockets/sockets_manifest_permission.cc",
     "api/sockets/sockets_manifest_permission.h",
     "common_manifest_handlers.cc",
     "common_manifest_handlers.h",
-    "constants.cc",
-    "constants.h",
     "csp_validator.cc",
     "csp_validator.h",
     "dom_action_types.h",
     "draggable_region.cc",
     "draggable_region.h",
     "error_utils.cc",
     "error_utils.h",
     "event_filter.cc",
     "event_filter.h",
     "event_filtering_info.cc",
@@ skipping 150 matching lines @@
     "url_pattern_set.h",
     "user_script.cc",
     "user_script.h",
     "value_counter.cc",
     "value_counter.h",
     "view_type.cc",
     "view_type.h",
   ]
 
   deps = [
+    ":common_constants",
     ":mojo",
     # TODO(benwells): figure out what to do with the api target and
     # api resources compiled into the chrome resource bundle.
     # http://crbug.com/162530
     "//chrome:resources",
     "//components/crx_file",
     "//components/url_matcher",
     "//content/public/common",
     "//crypto",
     "//extensions/strings",
@@ skipping 48 matching lines @@
       "manifest_handlers/nacl_modules_handler.h",
     ]
   }
 
   if (is_win) {
     cflags = [
       "/wd4267", # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     ]
   }
 }