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

webkit/tools/test_shell/test_shell_main.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.
 
 #include "app/app_switches.h"
 #include "app/gfx/gl/gl_implementation.h"
 #include "base/at_exit.h"
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 223 matching lines @@
   // Treat the first argument as the initial URL to open.
   GURL starting_url;
 
   FilePath path;
   PathService::Get(base::DIR_SOURCE_ROOT, &path);
   path = path.AppendASCII("webkit").AppendASCII("data")
              .AppendASCII("test_shell").AppendASCII("index.html");
   starting_url = net::FilePathToFileURL(path);
 
   const std::vector<CommandLine::StringType>& args = parsed_command_line.args();
-  if (args.size() > 0) {
+  if (!args.empty()) {
     GURL url(args[0]);
     if (url.is_valid()) {
       starting_url = url;
     } else {
       // Treat as a relative file path.
       FilePath path = FilePath(args[0]);
       file_util::AbsolutePath(&path);
       starting_url = net::FilePathToFileURL(path);
     }
   }
@@ skipping 93 matching lines @@
   TestShell::ShutdownTestShell();
   TestShell::CleanupLogging();
 
   // Tear down shared StatsTable; prevents unit_tests from leaking it.
   base::StatsTable::set_current(NULL);
   delete table;
   RemoveSharedMemoryFile(stats_filename);
 
   return 0;
 }