Update base/timer.h code to pass through Location from call sites.

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 78c1bab56d4a52a59694370c14714640c0b8cb3e..83c7822abde5d3ead5833c2e7df049987869c804 100644
--- a/chrome/browser/safe_browsing/protocol_manager.cc
+++ b/chrome/browser/safe_browsing/protocol_manager.cc
@@ -503,7 +503,7 @@ void SafeBrowsingProtocolManager::ForceScheduleNextUpdate(
   // Unschedule any current timer.
   update_timer_.Stop();
   update_timer_.Start(TimeDelta::FromMilliseconds(next_update_msec), this,
-                      &SafeBrowsingProtocolManager::GetNextUpdate);
+                      &SafeBrowsingProtocolManager::GetNextUpdate, FROM_HERE);
 }
 
 // According to section 5 of the SafeBrowsing protocol specification, we must
@@ -621,7 +621,8 @@ void SafeBrowsingProtocolManager::OnGetChunksComplete(
 
   // Begin the update request timeout.
   update_timer_.Start(TimeDelta::FromSeconds(kSbMaxUpdateWaitSec), this,
-                      &SafeBrowsingProtocolManager::UpdateResponseTimeout);
+                      &SafeBrowsingProtocolManager::UpdateResponseTimeout,
+                      FROM_HERE);
 }
 
 // If we haven't heard back from the server with an update response, this method