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

chrome/browser/importer/ie_importer.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/importer/ie_importer.h"
 
 #include <ole2.h>
 #include <intshcut.h>
 #include <pstore.h>
 #include <shlobj.h>
@@ skipping 508 matching lines @@
     GURL url = GURL(ResolveInternetShortcut(*it));
     if (!url.is_valid())
       continue;
 
     // Make the relative path from the Favorites folder, without the basename.
     // ex. Suppose that the Favorites folder is C:\Users\Foo\Favorites.
     //   C:\Users\Foo\Favorites\Foo.url -> ""
     //   C:\Users\Foo\Favorites\Links\Bar\Baz.url -> "Links\Bar"
     FilePath::StringType relative_string =
         shortcut.DirName().value().substr(favorites_path_len);
-    if (relative_string.size() > 0 && FilePath::IsSeparator(relative_string[0]))
+    if (!relative_string.empty() && FilePath::IsSeparator(relative_string[0]))
       relative_string = relative_string.substr(1);
     FilePath relative_path(relative_string);
 
     ProfileWriter::BookmarkEntry entry;
     // Remove the dot, the file extension, and the directory path.
     entry.title = shortcut.RemoveExtension().BaseName().value();
     entry.url = url;
     entry.creation_time = GetFileCreationTime(*it);
     if (!relative_path.empty())
       relative_path.GetComponents(&entry.path);
 
     // Flatten the bookmarks in Link folder onto bookmark toolbar. Otherwise,
     // put it into "Other bookmarks".
     if (import_to_bookmark_bar() &&
-        (entry.path.size() > 0 && entry.path[0] == info.links_folder)) {
+        (!entry.path.empty() && entry.path[0] == info.links_folder)) {
       entry.in_toolbar = true;
       entry.path.erase(entry.path.begin());
       toolbar_bookmarks.push_back(entry);
     } else {
       // We put the bookmarks in a "Imported From IE"
       // folder, so that we don't mess up the "Other bookmarks".
       if (!import_to_bookmark_bar())
         entry.path.insert(entry.path.begin(), ie_folder);
       bookmarks->push_back(entry);
     }
@@ skipping 33 matching lines @@
   if (version < 0) {
     wchar_t buffer[128];
     DWORD buffer_length = sizeof(buffer);
     base::win::RegKey reg_key(HKEY_LOCAL_MACHINE,
         L"Software\\Microsoft\\Internet Explorer", KEY_READ);
     LONG result = reg_key.ReadValue(L"Version", buffer, &buffer_length, NULL);
     version = ((result == ERROR_SUCCESS)? _wtoi(buffer) : 0);
   }
   return version;
 }