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

chrome/test/reliability/page_load_test.cc

 // Copyright (c) 2010 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.
 //
 // This file provides reliablity test which runs under UI test framework. The
 // test is intended to run within QEMU environment.
 //
 // Usage 1: reliability_test
 // Upon invocation, it visits a hard coded list of sample URLs. This is mainly
 // used by buildbot, to verify reliability_test itself runs ok.
@@ skipping 273 matching lines @@
         break;
     }
 
     // Get crash dumps - don't delete them if logging.
     std::vector<FilePath> new_crash_dumps;
     CollectNewCrashDumps(new_crash_dumps, &metrics, !log_file.is_open());
 
     bool do_log = log_file.is_open() &&
                   (!log_only_error ||
                    metrics.result != NAVIGATION_SUCCESS ||
-                   new_crash_dumps.size() > 0);
+                   !new_crash_dumps.empty());
     if (do_log) {
       log_file << url_string;
       switch (metrics.result) {
         case NAVIGATION_ERROR:
           log_file << " error";
           break;
         case NAVIGATION_SUCCESS:
           log_file << " success";
           break;
         case NAVIGATION_AUTH_NEEDED:
@@ skipping 515 matching lines @@
     }
   }
 
   if (parsed_command_line.HasSwitch(kStressOptSwitch)) {
     g_stress_opt = true;
   }
   if (parsed_command_line.HasSwitch(kStressDeoptSwitch)) {
     g_stress_deopt = true;
   }
 }