Makes windowmanager draw non-client area

components/mus/public/cpp/lib/window_tree_client_impl.cc

Index: components/mus/public/cpp/lib/window_tree_client_impl.cc
diff --git a/components/mus/public/cpp/lib/window_tree_client_impl.cc b/components/mus/public/cpp/lib/window_tree_client_impl.cc
index 2191af5591b32418f34555f44262b96b2aa3ad17..fe14de325bb4668d8dfc0ac88b490eadf5585a4a 100644
--- a/components/mus/public/cpp/lib/window_tree_client_impl.cc
+++ b/components/mus/public/cpp/lib/window_tree_client_impl.cc
@@ -15,6 +15,7 @@
 #include "mojo/application/public/cpp/service_provider_impl.h"
 #include "mojo/application/public/interfaces/service_provider.mojom.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
+#include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace mus {
@@ -168,9 +169,9 @@ void WindowTreeClientImpl::SetBounds(Id window_id, const gfx::Rect& bounds) {
 }
 
 void WindowTreeClientImpl::SetClientArea(Id window_id,
-                                         const gfx::Rect& client_area) {
+                                         const gfx::Insets& client_area) {
   DCHECK(tree_);
-  tree_->SetClientArea(window_id, mojo::Rect::From(client_area));
+  tree_->SetClientArea(window_id, mojo::Insets::From(client_area));
 }
 
 void WindowTreeClientImpl::SetFocus(Id window_id) {
@@ -353,12 +354,13 @@ void WindowTreeClientImpl::OnWindowBoundsChanged(Id window_id,
       .LocalSetBounds(old_bounds.To<gfx::Rect>(), new_bounds.To<gfx::Rect>());
 }
 
-void WindowTreeClientImpl::OnClientAreaChanged(uint32_t window_id,
-                                               mojo::RectPtr old_client_area,
-                                               mojo::RectPtr new_client_area) {
+void WindowTreeClientImpl::OnClientAreaChanged(
+    uint32_t window_id,
+    mojo::InsetsPtr old_client_area,
+    mojo::InsetsPtr new_client_area) {
   Window* window = GetWindowById(window_id);
   if (window)
-    WindowPrivate(window).LocalSetClientArea(new_client_area.To<gfx::Rect>());
+    WindowPrivate(window).LocalSetClientArea(new_client_area.To<gfx::Insets>());
 }
 
 namespace {