chromeos: converts WindowState to 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 433ee9a0bcb98ef1ccb2ee57caae7b272ef90452..9cc2362654bb8cad4b0565ed952d4a28ba239fa1 100644
--- a/ash/wm/workspace/workspace_event_handler.cc
+++ b/ash/wm/workspace/workspace_event_handler.cc
@@ -8,6 +8,8 @@
 #include "ash/wm/window_state.h"
 #include "ash/wm/wm_event.h"
 #include "ash/wm_window.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_delegate.h"
 #include "ui/base/hit_test.h"
 #include "ui/events/event.h"
 
@@ -97,9 +99,12 @@ void WorkspaceEventHandler::OnGestureEvent(ui::GestureEvent* event,
 void WorkspaceEventHandler::HandleVerticalResizeDoubleClick(
     wm::WindowState* target_state,
     ui::MouseEvent* event) {
-  WmWindow* target = target_state->window();
+  aura::Window* target = target_state->window();
   if (event->flags() & ui::EF_IS_DOUBLE_CLICK) {
-    int component = target->GetNonClientComponent(event->location());
+    int component =
+        target->delegate()

[msw, 2017/05/23 05:46:55]

optional nit: since this block is contingent on a valid non-client hit
component, you can probably put "|| !target->delegate()" in the conditional
above and then assume it's valid here.

[sky, 2017/05/23 17:14:38]

Done.

+            ? target->delegate()->GetNonClientComponent(event->location())
+            : HTNOWHERE;
     if (component == HTBOTTOM || component == HTTOP) {
       ShellPort::Get()->RecordUserMetricsAction(
           UMA_TOGGLE_SINGLE_AXIS_MAXIMIZE_BORDER_CLICK);