app_shell: Repack extensions strings.

BUG=373540
TEST=see bug for repro; should not DCHECK.

Review URL: https://codereview.chromium.org/290553003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270876 0039d316-1c4b-4281-b951-d872f2087c98

apps/shell/app_shell.gyp

@@ -34,6 +34,7 @@
         '<(DEPTH)/content/content_shell_and_tests.gyp:content_shell_resources',
         '<(DEPTH)/content/browser/devtools/devtools_resources.gyp:devtools_resources',
         '<(DEPTH)/extensions/extensions_resources.gyp:extensions_resources',
+        '<(DEPTH)/extensions/extensions_strings.gyp:extensions_strings',
         '<(DEPTH)/ui/base/strings/ui_strings.gyp:ui_strings',
         '<(DEPTH)/ui/resources/ui_resources.gyp:ui_resources',
       ],
@@ -51,6 +52,7 @@
               '<(SHARED_INTERMEDIATE_DIR)/chrome/renderer_resources_100_percent.pak',
               '<(SHARED_INTERMEDIATE_DIR)/content/shell_resources.pak',
               '<(SHARED_INTERMEDIATE_DIR)/extensions/extensions_resources.pak',
+              '<(SHARED_INTERMEDIATE_DIR)/extensions/strings/extensions_strings_en-US.pak',
               '<(SHARED_INTERMEDIATE_DIR)/ui/app_locale_settings/app_locale_settings_en-US.pak',
               '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources_100_percent.pak',
               '<(SHARED_INTERMEDIATE_DIR)/ui/ui_strings/ui_strings_en-US.pak',