Remove not needed ExtensionUpdater::default_params_ and its setter.

chrome/browser/extensions/updater/extension_updater.cc

Index: chrome/browser/extensions/updater/extension_updater.cc
diff --git a/chrome/browser/extensions/updater/extension_updater.cc b/chrome/browser/extensions/updater/extension_updater.cc
index 939fe69d193043fb806ff6f9334c8c0f095f560c..695e6a1612e80e48f125bfd3c5c991470d683c49 100644
--- a/chrome/browser/extensions/updater/extension_updater.cc
+++ b/chrome/browser/extensions/updater/extension_updater.cc
@@ -269,7 +269,7 @@ void ExtensionUpdater::ScheduleNextCheck(const TimeDelta& target_delay) {
 
 void ExtensionUpdater::TimerFired() {
   DCHECK(alive_);
-  CheckNow(default_params_);
+  CheckNow(CheckParams());
 
   // If the user has overridden the update frequency, don't bother reporting
   // this.
@@ -321,7 +321,7 @@ void ExtensionUpdater::StopTimerForTesting() {
 
 void ExtensionUpdater::DoCheckSoon() {
   DCHECK(will_check_soon_);
-  CheckNow(default_params_);
+  CheckNow(CheckParams());
   will_check_soon_ = false;
 }