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

base/mime_util_xdg.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 "base/mime_util.h"
 
 #include <gtk/gtk.h>
 #include <sys/time.h>
 #include <time.h>
 
@@ skipping 507 matching lines @@
         default_themes[j] = NULL;
     }
   }
 }
 
 // Try to find an icon with the name |icon_name| that's |size| pixels.
 FilePath LookupIconInDefaultTheme(const std::string& icon_name, int size) {
   EnsureUpdated();
   MimeUtilConstants* constants = MimeUtilConstants::GetInstance();
   std::map<std::string, IconTheme*>* icon_themes = constants->icon_themes_;
-  if (icon_themes->size() == 0)
+  if (icon_themes->empty())
     InitDefaultThemes();
 
   FilePath icon_path;
   IconTheme** default_themes = constants->default_themes_;
   for (size_t i = 0; i < MimeUtilConstants::kDefaultThemeNum; i++) {
     if (default_themes[i]) {
       icon_path = default_themes[i]->GetIconPath(icon_name, size, true);
       if (!icon_path.empty())
         return icon_path;
     }
@@ skipping 80 matching lines @@
     } else {
       icon_file = LookupIconInDefaultTheme(icon_names[i], size);
       if (!icon_file.empty())
         return icon_file;
     }
   }
   return FilePath();
 }
 
 }  // namespace mime_util