Moves management of transients out of Window

ui/wm/core/easy_resize_window_targeter.cc

Index: ui/wm/core/easy_resize_window_targeter.cc
diff --git a/ui/wm/core/easy_resize_window_targeter.cc b/ui/wm/core/easy_resize_window_targeter.cc
index f3a2b0a77ebcdb09506581d4daa95ca4b2d2c4de..1f0e90a0eb8ea47f2a580ecd46ca03456b11d188 100644
--- a/ui/wm/core/easy_resize_window_targeter.cc
+++ b/ui/wm/core/easy_resize_window_targeter.cc
@@ -4,6 +4,7 @@
 
 #include "ui/wm/public/easy_resize_window_targeter.h"
 
+#include "ui/aura/client/transient_window_client.h"
 #include "ui/aura/window.h"
 #include "ui/gfx/geometry/insets_f.h"
 #include "ui/gfx/geometry/rect.h"
@@ -25,10 +26,7 @@ EasyResizeWindowTargeter::~EasyResizeWindowTargeter() {
 bool EasyResizeWindowTargeter::EventLocationInsideBounds(
     aura::Window* window,
     const ui::LocatedEvent& event) const {
-  // Use the extended bounds only for immediate child windows of |container_|.
-  // Use the default targetter otherwise.
-  if (window->parent() == container_ && (!window->transient_parent() ||
-      window->transient_parent() == container_)) {
+  if (ShouldUseExtendedBounds(window)) {
     gfx::RectF bounds(window->bounds());
     gfx::Transform transform = window->layer()->transform();
     transform.TransformRect(&bounds);
@@ -45,4 +43,18 @@ bool EasyResizeWindowTargeter::EventLocationInsideBounds(
   return WindowTargeter::EventLocationInsideBounds(window, event);
 }
 
+bool EasyResizeWindowTargeter::ShouldUseExtendedBounds(
+    const aura::Window* window) const {
+  // Use the extended bounds only for immediate child windows of |container_|.
+  // Use the default targetter otherwise.
+  if (window->parent() != container_)
+    return false;
+
+  aura::client::TransientWindowClient* transient_window_client =
+      aura::client::GetTransientWindowClient();
+  return !transient_window_client ||
+      !transient_window_client->GetTransientParent(window) ||
+      transient_window_client->GetTransientParent(window) == container_;
+}
+
 }  // namespace wm