Makes windowmanager draw non-client area

components/mus/ws/window_tree_impl.cc

Index: components/mus/ws/window_tree_impl.cc
diff --git a/components/mus/ws/window_tree_impl.cc b/components/mus/ws/window_tree_impl.cc
index e4eca337c2feff5eacf9e0b2862e20f8cb9c3d43..43f6e2580ae034789b3cf7560e47b8119cfae9e7 100644
--- a/components/mus/ws/window_tree_impl.cc
+++ b/components/mus/ws/window_tree_impl.cc
@@ -182,15 +182,16 @@ void WindowTreeImpl::ProcessWindowBoundsChanged(const ServerWindow* window,
                                   Rect::From(new_bounds));
 }
 
-void WindowTreeImpl::ProcessClientAreaChanged(const ServerWindow* window,
-                                              const gfx::Rect& old_client_area,
-                                              const gfx::Rect& new_client_area,
-                                              bool originated_change) {
+void WindowTreeImpl::ProcessClientAreaChanged(
+    const ServerWindow* window,
+    const gfx::Insets& old_client_area,
+    const gfx::Insets& new_client_area,
+    bool originated_change) {
   if (originated_change || !IsWindowKnown(window))
     return;
   client()->OnClientAreaChanged(WindowIdToTransportId(window->id()),
-                                Rect::From(old_client_area),
-                                Rect::From(new_client_area));
+                                mojo::Insets::From(old_client_area),
+                                mojo::Insets::From(new_client_area));
 }
 
 void WindowTreeImpl::ProcessViewportMetricsChanged(
@@ -669,16 +670,14 @@ void WindowTreeImpl::SetImeVisibility(Id transport_window_id,
   }
 }
 
-void WindowTreeImpl::SetClientArea(Id transport_window_id, mojo::RectPtr rect) {
+void WindowTreeImpl::SetClientArea(Id transport_window_id,
+                                   mojo::InsetsPtr insets) {
   ServerWindow* window =
       GetWindow(WindowIdFromTransportId(transport_window_id));
   if (!window || !access_policy_->CanSetClientArea(window))
     return;
 
-  if (rect.is_null())
-    window->SetClientArea(gfx::Rect(window->bounds().size()));
-  else
-    window->SetClientArea(rect.To<gfx::Rect>());
+  window->SetClientArea(insets.To<gfx::Insets>());
 }
 
 void WindowTreeImpl::Embed(Id transport_window_id,
@@ -735,13 +734,6 @@ void WindowTreeImpl::SetShowState(uint32_t window_id,
   GetHost()->window_manager()->SetShowState(window_id, show_state, callback);
 }
 
-void WindowTreeImpl::GetDisplays(const GetDisplaysCallback& callback) {
-  if (!GetHost() || !GetHost()->window_manager())
-    return;
-
-  GetHost()->window_manager()->GetDisplays(callback);
-}
-
 bool WindowTreeImpl::IsRootForAccessPolicy(const WindowId& id) const {
   return IsRoot(id);
 }