Move CrxFile, FileReader, ExtensionResource to src/extensions.

chrome/chrome_tests_unit.gypi

Index: chrome/chrome_tests_unit.gypi
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index 6a61c82ad472124fad7cadb14d797eee9eca5e2d..19cb886b8f741ba0821730638ded507b2fee0fa4 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -455,7 +455,10 @@
       },
       'sources': [
         '../apps/app_shim/app_shim_host_mac_unittest.cc',
+        '../extensions/browser/file_reader_unittest.cc',
         '../extensions/common/event_filter_unittest.cc',
+        '../extensions/common/extension_resource_unittest.cc',
+        '../extensions/common/id_util_unittest.cc',
         '../extensions/common/matcher/regex_set_matcher_unittest.cc',
         '../extensions/common/matcher/string_pattern_unittest.cc',
         '../extensions/common/matcher/substring_set_matcher_unittest.cc',
@@ -768,7 +771,6 @@
         'browser/extensions/menu_manager_unittest.cc',
         'browser/extensions/page_action_controller_unittest.cc',
         'browser/extensions/permissions_updater_unittest.cc',
-        'browser/extensions/file_reader_unittest.cc',
         'browser/extensions/image_loader_unittest.cc',
         'browser/extensions/key_identifier_conversion_views_unittest.cc',
         'browser/extensions/management_policy_unittest.cc',
@@ -1512,7 +1514,6 @@
         'common/extensions/extension_icon_set_unittest.cc',
         'common/extensions/extension_l10n_util_unittest.cc',
         'common/extensions/extension_localization_peer_unittest.cc',
-        'common/extensions/extension_resource_unittest.cc',
         'common/extensions/extension_set_unittest.cc',
         'common/extensions/extension_unittest.cc',
         'common/extensions/feature_switch_unittest.cc',