Cleanup of proxy settings api implementation.

BUG=none
TEST=browser_tests --gtest_filter='ProxySettingsApiTest.*' remains green

Review URL: http://codereview.chromium.org/6744001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@79397 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 58df726..136fd8f 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -987,6 +987,8 @@
         'browser/extensions/extension_protocols.h',
         'browser/extensions/extension_proxy_api.cc',
         'browser/extensions/extension_proxy_api.h',
+        'browser/extensions/extension_proxy_api_constants.cc',
+        'browser/extensions/extension_proxy_api_constants.h',
         'browser/extensions/extension_rlz_module.cc',
         'browser/extensions/extension_rlz_module.h',
         'browser/extensions/extension_service.cc',