Change other usages of .size() to .empty() when applicable.

chrome/browser/prerender/prerender_manager.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/prerender/prerender_manager.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
@@ skipping 44 matching lines @@
 
 PrerenderManager::PrerenderManager(Profile* profile)
     : profile_(profile),
       max_prerender_age_(base::TimeDelta::FromSeconds(
           kDefaultMaxPrerenderAgeSeconds)),
       max_elements_(kDefaultMaxPrerenderElements),
       prerender_contents_factory_(PrerenderContents::CreateFactory()) {
 }
 
 PrerenderManager::~PrerenderManager() {
-  while (prerender_list_.size() > 0) {
+  while (!prerender_list_.empty()) {
     PrerenderContentsData data = prerender_list_.front();
     prerender_list_.pop_front();
     data.contents_->set_final_status(FINAL_STATUS_MANAGER_SHUTDOWN);
     delete data.contents_;
   }
 }
 
 void PrerenderManager::SetPrerenderContentsFactory(
     PrerenderContents::Factory* prerender_contents_factory) {
   prerender_contents_factory_.reset(prerender_contents_factory);
@@ skipping 25 matching lines @@
     data = prerender_list_.front();
     prerender_list_.pop_front();
     data.contents_->set_final_status(FINAL_STATUS_EVICTED);
     delete data.contents_;
   }
   StartSchedulingPeriodicCleanups();
   return true;
 }
 
 void PrerenderManager::DeleteOldEntries() {
-  while (prerender_list_.size() > 0) {
+  while (!prerender_list_.empty()) {
     PrerenderContentsData data = prerender_list_.front();
     if (IsPrerenderElementFresh(data.start_time_))
       return;
     prerender_list_.pop_front();
     data.contents_->set_final_status(FINAL_STATUS_TIMED_OUT);
     delete data.contents_;
   }
   if (prerender_list_.empty())
     StopSchedulingPeriodicCleanups();
 }
@@ skipping 180 matching lines @@
   }
   for (std::vector<PrerenderContents*>::iterator it =
            prerender_contents.begin();
        it != prerender_contents.end();
        ++it) {
     (*it)->DestroyWhenUsingTooManyResources();
   }
 }
 
 }  // namespace prerender