Removes WindowState::aura_window()

ash/wm/workspace/workspace_event_handler.cc

Index: ash/wm/workspace/workspace_event_handler.cc
diff --git a/ash/wm/workspace/workspace_event_handler.cc b/ash/wm/workspace/workspace_event_handler.cc
index 615528649687b307381cb2afc8e6e4f3f1a2dec2..e6f98e1b336a69fff8e7b927d79af0773adc0289 100644
--- a/ash/wm/workspace/workspace_event_handler.cc
+++ b/ash/wm/workspace/workspace_event_handler.cc
@@ -8,6 +8,7 @@
 #include "ash/shell.h"
 #include "ash/touch/touch_uma.h"
 #include "ash/wm/common/wm_event.h"
+#include "ash/wm/common/wm_window.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_state_aura.h"
 #include "ui/aura/window.h"
@@ -111,10 +112,9 @@ void WorkspaceEventHandler::OnGestureEvent(ui::GestureEvent* event) {
 void WorkspaceEventHandler::HandleVerticalResizeDoubleClick(
     wm::WindowState* target_state,
     ui::MouseEvent* event) {
-  aura::Window* target = target_state->aura_window();
+  wm::WmWindow* target = target_state->window();
   if (event->flags() & ui::EF_IS_DOUBLE_CLICK) {
-    int component =
-        target->delegate()->GetNonClientComponent(event->location());
+    int component = target->GetNonClientComponent(event->location());
     if (component == HTBOTTOM || component == HTTOP) {
       Shell::GetInstance()->metrics()->RecordUserMetricsAction(
           UMA_TOGGLE_SINGLE_AXIS_MAXIMIZE_BORDER_CLICK);