Move core extensions l10n code to //extensions

There are three important changes in this CL, all
interdependent enough that it seemed best to tackle
them at the same time.

1. message_bundle moves to //extensions. (mechanical)
2. extension_l10n_util moves to //extensions. (mechanical)
3. MessageBundle-related functionality from
   //chrome/c/e/extension_file_util has been
   moved into //extensions/common/file_util
   to support the move of extension_l10n_util.

BUG=359836
[email protected] for chrome/utility, browser_process_impl
[email protected] for tabs API
[email protected] for //c/b/chromeos/input_method
[email protected] for //c/b/chromeos/e/file_manager

Review URL: https://codereview.chromium.org/228073005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@262552 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service_unittest.cc b/chrome/browser/extensions/extension_service_unittest.cc
index 7d347009..cf6b075 100644
--- a/chrome/browser/extensions/extension_service_unittest.cc
+++ b/chrome/browser/extensions/extension_service_unittest.cc
@@ -70,7 +70,6 @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/api/plugins/plugins_handler.h"
-#include "chrome/common/extensions/extension_l10n_util.h"
 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
 #include "chrome/common/extensions/manifest_handlers/content_scripts_handler.h"
 #include "chrome/common/extensions/manifest_url_handler.h"
@@ -98,6 +97,7 @@
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_builder.h"
+#include "extensions/common/extension_l10n_util.h"
 #include "extensions/common/extension_resource.h"
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/manifest_handlers/background_info.h"