[Sync] Move //components/sync to the syncer namespace.

chrome/browser/ui/avatar_button_error_controller.h

Index: chrome/browser/ui/avatar_button_error_controller.h
diff --git a/chrome/browser/ui/avatar_button_error_controller.h b/chrome/browser/ui/avatar_button_error_controller.h
index 3ed18bf7ada059fdbc4fbe739d7fadb086348f26..549d7b12330632d5bc31af973d231f1214cd7434 100644
--- a/chrome/browser/ui/avatar_button_error_controller.h
+++ b/chrome/browser/ui/avatar_button_error_controller.h
@@ -48,7 +48,7 @@ class AvatarButtonErrorController {
 
   // Observes sync errors and updates the error controller for the avatar
   // button accordingly.
-  class SyncErrorObserver : public SyncErrorController::Observer {
+  class SyncErrorObserver : public syncer::SyncErrorController::Observer {
    public:
     SyncErrorObserver(
         Profile* profile,
@@ -61,7 +61,7 @@ class AvatarButtonErrorController {
     bool HasSyncError();
 
    private:
-    SyncErrorController* GetSyncErrorControllerIfNeeded();
+    syncer::SyncErrorController* GetSyncErrorControllerIfNeeded();
 
     Profile* profile_;
     AvatarButtonErrorController* avatar_button_error_controller_;