Fix "unreachable code" warnings (MSVC warning 4702) in content/.

content/common/content_switches_internal.cc

 // Copyright (c) 2014 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/common/content_switches_internal.h"
 
 #include "base/command_line.h"
 #include "content/public/common/content_switches.h"
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif
 
 namespace content {
 
 bool IsPinchToZoomEnabled() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
   // --disable-pinch should always disable pinch
   if (command_line.HasSwitch(switches::kDisablePinch))
     return false;
 
 #if defined(OS_WIN)
   return base::win::GetVersion() >= base::win::VERSION_WIN8;
 #elif defined(OS_CHROMEOS)
   return true;
-#endif
-
+#else
   return command_line.HasSwitch(switches::kEnableViewport) ||
       command_line.HasSwitch(switches::kEnablePinch);
+#endif
 }
 
 } // namespace content