Update bool WindowManager::OnWmSetBounds() to match with its desirable behavior.

services/ui/public/cpp/window_manager_delegate.h

Index: services/ui/public/cpp/window_manager_delegate.h
diff --git a/services/ui/public/cpp/window_manager_delegate.h b/services/ui/public/cpp/window_manager_delegate.h
index 51de4329f176f13a6af0d69432e57ddea6ce668a..e65b1dd32495924ae47c3e21f5fec80a18211e06 100644
--- a/services/ui/public/cpp/window_manager_delegate.h
+++ b/services/ui/public/cpp/window_manager_delegate.h
@@ -75,7 +75,7 @@ class WindowManagerDelegate {
   // indicates the change is not allowed.
   // NOTE: This should not change the bounds of |window|. Instead return the
   // bounds the window should be in |bounds|.
-  virtual bool OnWmSetBounds(Window* window, gfx::Rect* bounds) = 0;
+  virtual void OnWmSetBounds(Window* window, const gfx::Rect& bounds) = 0;
 
   // A client requested the shared property named |name| to change to
   // |new_data|. Return true to allow the change to |new_data|, false