Replace tracked_objects::Location with base::Location.

Part 1/4 to replace these namespace qualifications.

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Bug: 763556
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I06ec01e1805744a7bba244b35ed09ace7af3152a
Reviewed-on: https://chromium-review.googlesource.com/662560
Commit-Queue: Brett Wilson <[email protected]>
Reviewed-by: Daniel Cheng <[email protected]>
Reviewed-by: Brett Wilson <[email protected]>
Cr-Commit-Position: refs/heads/master@{#501189}
diff --git a/chrome/browser/extensions/extension_sync_service.cc b/chrome/browser/extensions/extension_sync_service.cc
index 27685b7..d30af03 100644
--- a/chrome/browser/extensions/extension_sync_service.cc
+++ b/chrome/browser/extensions/extension_sync_service.cc
@@ -252,7 +252,7 @@
 }
 
 syncer::SyncError ExtensionSyncService::ProcessSyncChanges(
-    const tracked_objects::Location& from_here,
+    const base::Location& from_here,
     const syncer::SyncChangeList& change_list) {
   for (const syncer::SyncChange& sync_change : change_list) {
     std::unique_ptr<ExtensionSyncData> extension_sync_data(