Get rid of PrefService::GetMutableDictionary/GetMutableList

chrome/browser/ui/cocoa/browser_window_controller_private.mm

 // Copyright (c) 2011 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller_private.h"
 
 #include "base/command_line.h"
 #import "base/memory/scoped_nsobject.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_list.h"
 #import "chrome/browser/ui/cocoa/fast_resize_view.h"
 #import "chrome/browser/ui/cocoa/find_bar/find_bar_cocoa_controller.h"
 #import "chrome/browser/ui/cocoa/floating_bar_backing_view.h"
 #import "chrome/browser/ui/cocoa/framed_browser_window.h"
 #import "chrome/browser/ui/cocoa/fullscreen_controller.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_container_controller.h"
 #import "chrome/browser/ui/cocoa/tab_contents/previewable_contents_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/side_tab_strip_controller.h"
@@ skipping 88 matching lines @@
   bounds.set_y(monitorFrame.size.height - bounds.y() - bounds.height());
 
   // We also need to save the current work area, in flipped coordinates.
   gfx::Rect workArea(NSRectToCGRect([windowScreen visibleFrame]));
   workArea.set_y(monitorFrame.size.height - workArea.y() - workArea.height());
 
   // Browser::SaveWindowPlacement is used for session restore.
   if (browser_->ShouldSaveWindowPlacement())
     browser_->SaveWindowPlacement(bounds, /*maximized=*/ false);
 
-  DictionaryValue* windowPreferences = prefs->GetMutableDictionary(
-      browser_->GetWindowPlacementKey().c_str());
+  DictionaryPrefUpdate update(prefs, browser_->GetWindowPlacementKey().c_str());
+  DictionaryValue* windowPreferences = update.Get();
   windowPreferences->SetInteger("left", bounds.x());
   windowPreferences->SetInteger("top", bounds.y());
   windowPreferences->SetInteger("right", bounds.right());
   windowPreferences->SetInteger("bottom", bounds.bottom());
   windowPreferences->SetBoolean("maximized", false);
   windowPreferences->SetBoolean("always_on_top", false);
   windowPreferences->SetInteger("work_area_left", workArea.x());
   windowPreferences->SetInteger("work_area_top", workArea.y());
   windowPreferences->SetInteger("work_area_right", workArea.right());
   windowPreferences->SetInteger("work_area_bottom", workArea.bottom());
@@ skipping 399 matching lines @@
 - (void)disableBarVisibilityUpdates {
   // Early escape if there's nothing to do.
   if (!barVisibilityUpdatesEnabled_)
     return;
 
   barVisibilityUpdatesEnabled_ = NO;
   [fullscreenController_ cancelAnimationAndTimers];
 }
 
 @end  // @implementation BrowserWindowController(Private)