Revert "Currently, base/timer.cc calls PostTask with FROM_HERE as the Location,

chrome/browser/safe_browsing/protocol_manager.cc

Index: chrome/browser/safe_browsing/protocol_manager.cc
diff --git a/chrome/browser/safe_browsing/protocol_manager.cc b/chrome/browser/safe_browsing/protocol_manager.cc
index f412b04159ce0835c72a4e4f83d6b867ceab44f8..78c1bab56d4a52a59694370c14714640c0b8cb3e 100644
--- a/chrome/browser/safe_browsing/protocol_manager.cc
+++ b/chrome/browser/safe_browsing/protocol_manager.cc
@@ -502,8 +502,8 @@ void SafeBrowsingProtocolManager::ForceScheduleNextUpdate(
   DCHECK_GE(next_update_msec, 0);
   // Unschedule any current timer.
   update_timer_.Stop();
-  update_timer_.Start(FROM_HERE, TimeDelta::FromMilliseconds(next_update_msec),
-                      this, &SafeBrowsingProtocolManager::GetNextUpdate);
+  update_timer_.Start(TimeDelta::FromMilliseconds(next_update_msec), this,
+                      &SafeBrowsingProtocolManager::GetNextUpdate);
 }
 
 // According to section 5 of the SafeBrowsing protocol specification, we must
@@ -620,8 +620,7 @@ void SafeBrowsingProtocolManager::OnGetChunksComplete(
   request_->Start();
 
   // Begin the update request timeout.
-  update_timer_.Start(FROM_HERE, TimeDelta::FromSeconds(kSbMaxUpdateWaitSec),
-                      this,
+  update_timer_.Start(TimeDelta::FromSeconds(kSbMaxUpdateWaitSec), this,
                       &SafeBrowsingProtocolManager::UpdateResponseTimeout);
 }