Make gfx::Rect class operations consistently mutate the class they are called on.

ui/views/widget/desktop_root_window_host_linux.cc

 // 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.
 
 #include "ui/views/widget/desktop_root_window_host_linux.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
 
@@ skipping 354 matching lines @@
     }
   }
 
   gfx::Rect window_bounds(
       parent_bounds.x() + (parent_bounds.width() - size.width()) / 2,
       parent_bounds.y() + (parent_bounds.height() - size.height()) / 2,
       size.width(),
       size.height());
   // Don't size the window bigger than the parent, otherwise the user may not be
   // able to close or move it.
-  window_bounds = window_bounds.AdjustToFit(parent_bounds);
+  window_bounds.AdjustToFit(parent_bounds);
 
   SetBounds(window_bounds);
 }
 
 void DesktopRootWindowHostLinux::GetWindowPlacement(
     gfx::Rect* bounds,
     ui::WindowShowState* show_state) const {
   *bounds = bounds_;
 
   // TODO(erg): This needs a better implementation. For now, we're just pass
@@ skipping 671 matching lines @@
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostLinux(native_widget_delegate,
                                         desktop_native_widget_aura,
                                         initial_bounds);
 }
 
 }  // namespace views