Move CrxFile, FileReader, ExtensionResource to src/extensions.

chrome/chrome_common.gypi

Index: chrome/chrome_common.gypi
diff --git a/chrome/chrome_common.gypi b/chrome/chrome_common.gypi
index 3be3e07c74ce322440384cbe4812293c83494dd8..8636bae00b6819d8098cd32b5cd6594960d9d74b 100644
--- a/chrome/chrome_common.gypi
+++ b/chrome/chrome_common.gypi
@@ -56,6 +56,8 @@
         '../apps/app_shim/app_shim_messages.h',
         '../extensions/common/constants.cc',
         '../extensions/common/constants.h',
+        '../extensions/common/crx_file.cc',
+        '../extensions/common/crx_file.h',
         '../extensions/common/draggable_region.cc',
         '../extensions/common/draggable_region.h',
         '../extensions/common/error_utils.cc',
@@ -66,6 +68,10 @@
         '../extensions/common/event_filtering_info.h',
         '../extensions/common/event_matcher.cc',
         '../extensions/common/event_matcher.h',
+        '../extensions/common/extension_resource.cc',
+        '../extensions/common/extension_resource.h',
+        '../extensions/common/id_util.cc',
+        '../extensions/common/id_util.h',
         '../extensions/common/install_warning.h',
         '../extensions/common/install_warning.cc',
         '../extensions/common/matcher/regex_set_matcher.cc',
@@ -210,8 +216,6 @@
         'common/extensions/extension_messages.h',
         'common/extensions/extension_process_policy.cc',
         'common/extensions/extension_process_policy.h',
-        'common/extensions/extension_resource.cc',
-        'common/extensions/extension_resource.h',
         'common/extensions/extension_set.cc',
         'common/extensions/extension_set.h',
         'common/extensions/feature_switch.cc',