Rename all methods accessing Singleton<T> as GetInstance().

ceee/ie/broker/executors_manager.cc

Index: ceee/ie/broker/executors_manager.cc
diff --git a/ceee/ie/broker/executors_manager.cc b/ceee/ie/broker/executors_manager.cc
index 4e2c32dbd833ae2035b78ce10bc40fbbc99f36e2..2256dbc9bcb9991753847043675842074c948cc5 100644
--- a/ceee/ie/broker/executors_manager.cc
+++ b/ceee/ie/broker/executors_manager.cc
@@ -75,8 +75,7 @@ ExecutorsManager* ExecutorsManager::GetInstance() {
 }
 
 bool ExecutorsManager::IsKnownWindow(HWND window) {
-  return Singleton<ExecutorsManager, ExecutorsManager::SingletonTraits>::get()->
-      IsKnownWindowImpl(window);
+  return GetInstance()->IsKnownWindowImpl(window);
 }
 
 bool ExecutorsManager::IsKnownWindowImpl(HWND window) {
@@ -86,8 +85,7 @@ bool ExecutorsManager::IsKnownWindowImpl(HWND window) {
 }
 
 HWND ExecutorsManager::FindTabChild(HWND window) {
-  return Singleton<ExecutorsManager, ExecutorsManager::SingletonTraits>::get()->
-      FindTabChildImpl(window);
+  return GetInstance()->FindTabChildImpl(window);
 }
 
 HWND ExecutorsManager::FindTabChildImpl(HWND window) {