Write the predictor state on shutdown on Android.

chrome/browser/net/predictor.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 "chrome/browser/net/predictor.h"
 
 #include <algorithm>
 #include <cmath>
 #include <set>
 #include <sstream>
@@ skipping 850 matching lines @@
 void Predictor::SaveDnsPrefetchStateForNextStartupAndTrim(
     base::ListValue* startup_list,
     base::ListValue* referral_list,
     base::WaitableEvent* completion) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   if (initial_observer_.get())
     initial_observer_->GetInitialDnsResolutionList(startup_list);
 
   // Do at least one trim at shutdown, in case the user wasn't running long
   // enough to do any regular trimming of referrers.
+  // TODO(lizeb): Should trimming really be done at each shutdown? This could be
+  // a frequent occurrence on Android.
   TrimReferrersNow();
   SerializeReferrers(referral_list);
 
   completion->Signal();
 }
 
 void Predictor::PreconnectUrl(const GURL& url,
                               const GURL& first_party_for_cookies,
                               UrlInfo::ResolutionMotivation motivation,
                               int count) {
@@ skipping 495 matching lines @@
 }
 
 void SimplePredictor::ShutdownOnUIThread() {
   SetShutdown(true);
 }
 
 bool SimplePredictor::CanPrefetchAndPrerender() const { return true; }
 bool SimplePredictor::CanPreresolveAndPreconnect() const { return true; }
 
 }  // namespace chrome_browser_net