Restore removed explanatory comment

content/browser/browser_main.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 "content/browser/browser_main.h"
 
 #include "base/allocator/allocator_shim.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 295 matching lines @@
   SetUpGLibLogHandler();
 #endif
 
 #if defined(TOOLKIT_GTK)
   // It is important for this to happen before the first run dialog, as it
   // styles the dialog as well.
   gfx::InitRCStyles();
 #endif
 
 #if defined(OS_WIN)
+  // Init common control sex.
   INITCOMMONCONTROLSEX config;
   config.dwSize = sizeof(config);
   config.dwICC = ICC_WIN95_CLASSES;
   if (!InitCommonControlsEx(&config))
     LOG_GETLASTERROR(FATAL);
 #endif
 
   ToolkitInitialized();
 }
 
@@ skipping 89 matching lines @@
   base::win::ScopedCOMInitializer com_initializer;
 #endif  // OS_WIN
 
   base::StatisticsRecorder statistics;
 
   parts->RunMainMessageLoopParts();
 
   TRACE_EVENT_END_ETW("BrowserMain", 0, 0);
   return parts->result_code();
 }