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

chrome/browser/ui/gtk/find_bar_gtk.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_GTK_FIND_BAR_GTK_H_
 #define CHROME_BROWSER_UI_GTK_FIND_BAR_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 86 matching lines @@
 
   // Returns the rectangle representing where to position the find bar. If
   // |avoid_overlapping_rect| is specified, the return value will be a rectangle
   // located immediately to the left of |avoid_overlapping_rect|, as long as
   // there is enough room for the dialog to draw within the bounds. If not, the
   // dialog position returned will overlap |avoid_overlapping_rect|.
   // Note: |avoid_overlapping_rect| is expected to use coordinates relative to
   // 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
   // always in sync with the UI language direction.
   void AdjustTextAlignment();
 
   // Get the position of the findbar within the floating container.
   gfx::Point GetPosition();
 
   static void OnParentSet(GtkWidget* widget, GtkObject* old_parent,
@@ skipping 113 matching lines @@
   // The selection rect we are currently showing. We cache it to avoid covering
   // it up.
   gfx::Rect selection_rect_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(FindBarGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_FIND_BAR_GTK_H_