[BackgroundSync Cleanup] Remove power observer

content/browser/background_sync/background_sync_manager.cc

Index: content/browser/background_sync/background_sync_manager.cc
diff --git a/content/browser/background_sync/background_sync_manager.cc b/content/browser/background_sync/background_sync_manager.cc
index 0f7fbcb6483ab2ab68be45d5f29314c388c9c6cb..b10978dde30e5412951fab805c921d8af67b644d 100644
--- a/content/browser/background_sync/background_sync_manager.cc
+++ b/content/browser/background_sync/background_sync_manager.cc
@@ -15,7 +15,6 @@
 #include "build/build_config.h"
 #include "content/browser/background_sync/background_sync_metrics.h"
 #include "content/browser/background_sync/background_sync_network_observer.h"
-#include "content/browser/background_sync/background_sync_power_observer.h"
 #include "content/browser/background_sync/background_sync_registration_handle.h"
 #include "content/browser/background_sync/background_sync_registration_options.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
@@ -316,8 +315,6 @@ BackgroundSyncManager::BackgroundSyncManager(
       base::Bind(&BackgroundSyncManager::OnNetworkChanged,
                  weak_ptr_factory_.GetWeakPtr())));
 #endif
-  power_observer_.reset(new BackgroundSyncPowerObserver(base::Bind(
-      &BackgroundSyncManager::OnPowerChanged, weak_ptr_factory_.GetWeakPtr())));
 }
 
 void BackgroundSyncManager::Init() {
@@ -413,7 +410,6 @@ void BackgroundSyncManager::InitDidGetDataFromBackend(
         options->periodicity = registration_proto.periodicity();
         options->min_period = registration_proto.min_period();
         options->network_state = registration_proto.network_state();
-        options->power_state = registration_proto.power_state();
 
         registration->set_id(registration_proto.id());
         registration->set_num_attempts(registration_proto.num_attempts());
@@ -674,7 +670,6 @@ void BackgroundSyncManager::StoreRegistrations(
     registration_proto->set_min_period(registration.options()->min_period);
     registration_proto->set_network_state(
         registration.options()->network_state);
-    registration_proto->set_power_state(registration.options()->power_state);
     registration_proto->set_num_attempts(registration.num_attempts());
     registration_proto->set_delay_until(
         registration.delay_until().ToInternalValue());
@@ -1075,8 +1070,7 @@ void BackgroundSyncManager::GetRegistrationsImpl(
 bool BackgroundSyncManager::AreOptionConditionsMet(
     const BackgroundSyncRegistrationOptions& options) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  return network_observer_->NetworkSufficient(options.network_state) &&
-         power_observer_->PowerSufficient(options.power_state);
+  return network_observer_->NetworkSufficient(options.network_state);
 }
 
 bool BackgroundSyncManager::IsRegistrationReadyToFire(
@@ -1455,12 +1449,6 @@ void BackgroundSyncManager::OnNetworkChanged() {
   FireReadyEvents();
 }
 
-void BackgroundSyncManager::OnPowerChanged() {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-
-  FireReadyEvents();
-}
-
 void BackgroundSyncManager::SetMaxSyncAttemptsImpl(
     int max_attempts,
     const base::Closure& callback) {