feat: enable Windows Control Overlay on Linux (#42682)

* feat: enable Windows Control Overlay on Linux

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* docs: update documentation for Linux WCO

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* fix: initial symbol painting

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* test: enable WCO tests for Linux

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* fix: add missing Layer include

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* chore: fix gn-check failure

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* fix: enable BrowserWindow.setTitleBarOverlay on Linux

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* test: fix test for maximize event on Linux

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* fix: geometry updating on BrowserWindow.setTitleBarOverlay

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* fix: crash when invalid titleBarStyle set

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* chore: clean up ordering and comments

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* Update docs/api/structures/base-window-options.md

Co-authored-by: Erick Zhao <erick@hotmail.ca>

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* feat: enable customizing symbolColor

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* docs: correct symbolColor reference

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

* chore: update patches

Co-authored-by: PatchUp <73610968+patchup[bot]@users.noreply.github.com>

* chore: remove Chrome-specific padding

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

---------

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
Co-authored-by: PatchUp <73610968+patchup[bot]@users.noreply.github.com>

shell/browser/native_window.cc

@@ -122,10 +122,6 @@ NativeWindow::NativeWindow(const gin_helper::Dictionary& options,
       int height;
       if (titlebar_overlay_dict.Get(options::kOverlayHeight, &height))
         titlebar_overlay_height_ = height;
-
-#if !(BUILDFLAG(IS_WIN) || BUILDFLAG(IS_MAC))
-      DCHECK(false);
-#endif
     }
   }