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

components/sync/test/engine/mock_nudge_handler.cc

Index: components/sync/test/engine/mock_nudge_handler.cc
diff --git a/components/sync/test/engine/mock_nudge_handler.cc b/components/sync/test/engine/mock_nudge_handler.cc
index 3146c78fdac64f6c7b79557bc10a29fed1d04513..54b5a6f45bb0378d11719a2cd27cbc9d0ec338aa 100644
--- a/components/sync/test/engine/mock_nudge_handler.cc
+++ b/components/sync/test/engine/mock_nudge_handler.cc
@@ -12,15 +12,15 @@ MockNudgeHandler::MockNudgeHandler()
 
 MockNudgeHandler::~MockNudgeHandler() {}
 
-void MockNudgeHandler::NudgeForInitialDownload(syncer::ModelType type) {
+void MockNudgeHandler::NudgeForInitialDownload(ModelType type) {
   num_initial_nudges_++;
 }
 
-void MockNudgeHandler::NudgeForCommit(syncer::ModelType type) {
+void MockNudgeHandler::NudgeForCommit(ModelType type) {
   num_commit_nudges_++;
 }
 
-void MockNudgeHandler::NudgeForRefresh(syncer::ModelType type) {
+void MockNudgeHandler::NudgeForRefresh(ModelType type) {
   num_refresh_nudges_++;
 }