Remove PrefService::ScheduleSavePersistentPrefs and SavePersistentPrefs.

chrome/browser/background/background_contents_service.cc

 // 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.
 
 #include "chrome/browser/background/background_contents_service.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 480 matching lines @@
   const string16& appid = GetParentApplicationId(background_contents);
   DictionaryValue* current;
   if (pref->GetDictionaryWithoutPathExpansion(UTF16ToUTF8(appid), &current))
     return;
 
   // No entry for this application yet, so add one.
   DictionaryValue* dict = new DictionaryValue();
   dict->SetString(kUrlKey, background_contents->GetURL().spec());
   dict->SetString(kFrameNameKey, contents_map_[appid].frame_name);
   pref->SetWithoutPathExpansion(UTF16ToUTF8(appid), dict);
-  prefs_->ScheduleSavePersistentPrefs();
 }
 
 void BackgroundContentsService::UnregisterBackgroundContents(
     BackgroundContents* background_contents) {
   if (!prefs_)
     return;
   DCHECK(IsTracked(background_contents));
   const string16 appid = GetParentApplicationId(background_contents);
   DictionaryPrefUpdate update(prefs_, prefs::kRegisteredBackgroundContents);
   update.Get()->RemoveWithoutPathExpansion(UTF16ToUTF8(appid), NULL);
-  prefs_->ScheduleSavePersistentPrefs();
 }
 
 void BackgroundContentsService::ShutdownAssociatedBackgroundContents(
     const string16& appid) {
   BackgroundContents* contents = GetAppBackgroundContents(appid);
   if (contents) {
     UnregisterBackgroundContents(contents);
     // Background contents destructor shuts down the renderer.
     delete contents;
   }
@@ skipping 45 matching lines @@
     TabContents* new_contents,
     WindowOpenDisposition disposition,
     const gfx::Rect& initial_pos,
     bool user_gesture) {
   Browser* browser = BrowserList::GetLastActiveWithProfile(
       Profile::FromBrowserContext(new_contents->browser_context()));
   if (!browser)
     return;
   browser->AddTabContents(new_contents, disposition, initial_pos, user_gesture);
 }