[Coverity] pass-by-ref instead of pass-by-val

chrome/browser/ui/gtk/find_bar_gtk.h

Index: chrome/browser/ui/gtk/find_bar_gtk.h
diff --git a/chrome/browser/ui/gtk/find_bar_gtk.h b/chrome/browser/ui/gtk/find_bar_gtk.h
index cd2101b403398df7f504f172fd1baddc6d6f2c28..6e5cdde608198450b82f612e6745f3627c1692a0 100644
--- a/chrome/browser/ui/gtk/find_bar_gtk.h
+++ b/chrome/browser/ui/gtk/find_bar_gtk.h
@@ -104,7 +104,7 @@ class FindBarGtk : public FindBar,
   // the top of the page area, (it will be converted to coordinates relative to
   // the top of the browser window, when comparing against the dialog
   // coordinates). The returned value is relative to the browser window.
-  gfx::Rect GetDialogPosition(gfx::Rect avoid_overlapping_rect);
+  gfx::Rect GetDialogPosition(const gfx::Rect& avoid_overlapping_rect);
 
   // Adjust the text alignment according to the text direction of the widget
   // and |text_entry_|'s content, to make sure the real text alignment is