[EasyUnlock] Observe proximity changes and clean up TX power strategy.

chrome/browser/signin/easy_unlock_service.cc

Index: chrome/browser/signin/easy_unlock_service.cc
diff --git a/chrome/browser/signin/easy_unlock_service.cc b/chrome/browser/signin/easy_unlock_service.cc
index e72b5b365bee07c4e0e54a3bef7ec6ede748fa0a..eb09e9a9a18c16cc424f56371bdb768c5877e930 100644
--- a/chrome/browser/signin/easy_unlock_service.cc
+++ b/chrome/browser/signin/easy_unlock_service.cc
@@ -791,10 +791,8 @@ EasyUnlockAuthEvent EasyUnlockService::GetPasswordAuthEvent() const {
         return PASSWORD_ENTRY_PHONE_UNSUPPORTED;
       case ScreenlockState::RSSI_TOO_LOW:
         return PASSWORD_ENTRY_RSSI_TOO_LOW;
-      case ScreenlockState::TX_POWER_TOO_HIGH:
-        return PASSWORD_ENTRY_TX_POWER_TOO_HIGH;
-      case ScreenlockState::PHONE_LOCKED_AND_TX_POWER_TOO_HIGH:
-        return PASSWORD_ENTRY_PHONE_LOCKED_AND_TX_POWER_TOO_HIGH;
+      case ScreenlockState::PHONE_LOCKED_AND_RSSI_TOO_LOW:
+        return PASSWORD_ENTRY_PHONE_LOCKED_AND_RSSI_TOO_LOW;
       case ScreenlockState::AUTHENTICATED:
         return PASSWORD_ENTRY_WITH_AUTHENTICATED_PHONE;
     }