Pure pedantry: Replace all ".size() == 0" with ".empty()".

webkit/tools/test_shell/test_shell_mac.mm

 // Copyright (c) 2006-2008 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 <ApplicationServices/ApplicationServices.h>
 #import <Cocoa/Cocoa.h>
 #import <objc/objc-runtime.h>
 #include <sys/stat.h>
 
 #include "webkit/tools/test_shell/test_shell.h"
@@ skipping 170 matching lines @@
 // static
 void TestShell::PlatformShutdown() {
   // for each window in the window list, release it and destroy its shell
   for (WindowList::iterator it = TestShell::windowList()->begin();
        it != TestShell::windowList()->end();
        ++it) {
     DestroyAssociatedShell(*it);
     [*it release];
   }
   // assert if we have anything left over, that would be bad.
-  DCHECK(window_map_.Get().size() == 0);
+  DCHECK(window_map_.Get().empty());
 
   // Dump the pasteboards we built up.
   [DumpRenderTreePasteboard releaseLocalPasteboards];
 }
 
 // static
 void TestShell::InitializeTestShell(bool layout_test_mode,
                                     bool allow_external_pages) {
   // This should move to a per-process platform-specific initialization function
   // when one exists.
@@ skipping 475 matching lines @@
   return false;
 }
 
 void DidLoadPlugin(const std::string& filename) {
 }
 
 void DidUnloadPlugin(const std::string& filename) {
 }
 
 }  // namespace webkit_glue