Moves RootWindowController::MoveWindowsTo to WmRootWindowController

ash/aura/wm_shell_aura.cc

Index: ash/aura/wm_shell_aura.cc
diff --git a/ash/aura/wm_shell_aura.cc b/ash/aura/wm_shell_aura.cc
index b8afc76772cfe2cb1cd5fe358515ce4ca5252a0f..946718d5f6f02f23add4b568157b4f42ae11ad64 100644
--- a/ash/aura/wm_shell_aura.cc
+++ b/ash/aura/wm_shell_aura.cc
@@ -129,6 +129,12 @@ bool WmShellAura::IsInUnifiedMode() const {
   return Shell::GetInstance()->display_manager()->IsInUnifiedMode();
 }
 
+bool WmShellAura::IsInUnifiedModeIgnoreMirroring() const {
+  return Shell::GetInstance()
+             ->display_manager()
+             ->current_default_multi_display_mode() == DisplayManager::UNIFIED;
+}
+
 bool WmShellAura::IsForceMaximizeOnFirstRun() {
   return delegate()->IsForceMaximizeOnFirstRun();
 }