Signed settings refactoring: Proper caching and more tests.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 3792350625fdbca24e60d082fa3376162df4d9bf..60b23c5247022f67a79a61a2155155ff73ace266 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -632,8 +632,8 @@
         'browser/chromeos/login/signed_settings.h',
         'browser/chromeos/login/signed_settings_helper.cc',
         'browser/chromeos/login/signed_settings_helper.h',
-        'browser/chromeos/login/signed_settings_temp_storage.cc',
-        'browser/chromeos/login/signed_settings_temp_storage.h',
+        'browser/chromeos/login/signed_settings_cache.cc',
+        'browser/chromeos/login/signed_settings_cache.h',
         'browser/chromeos/login/take_photo_view.cc',
         'browser/chromeos/login/take_photo_view.h',
         'browser/chromeos/login/test_attempt_state.cc',
@@ -737,6 +737,8 @@
         'browser/chromeos/setting_level_bubble.h',
         'browser/chromeos/setting_level_bubble_view.cc',
         'browser/chromeos/setting_level_bubble_view.h',
+        'browser/chromeos/signed_settings_migration_helper.cc',
+        'browser/chromeos/signed_settings_migration_helper.h',
         'browser/chromeos/sim_dialog_delegate.cc',
         'browser/chromeos/sim_dialog_delegate.h',
         'browser/chromeos/sms_observer.cc',
@@ -793,8 +795,8 @@
         'browser/chromeos/tab_closeable_state_watcher.h',
         'browser/chromeos/upgrade_detector_chromeos.cc',
         'browser/chromeos/upgrade_detector_chromeos.h',
-        'browser/chromeos/user_cros_settings_provider.cc',
-        'browser/chromeos/user_cros_settings_provider.h',
+        'browser/chromeos/device_settings_provider.cc',
+        'browser/chromeos/device_settings_provider.h',
         'browser/chromeos/version_loader.cc',
         'browser/chromeos/version_loader.h',
         'browser/chromeos/view_ids.h',