Switch on plugins by default for the Mac

chrome/browser/tab_contents/render_view_host_delegate_helper.cc

 // Copyright (c) 2009 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 "render_view_host_delegate_helper.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/character_encoding.h"
 #include "chrome/browser/profile.h"
@@ skipping 137 matching lines @@
   {  // Command line switches are used for preferences with no user interface.
     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
     web_prefs.developer_extras_enabled =
         !command_line.HasSwitch(switches::kDisableDevTools);
     web_prefs.javascript_enabled =
         !command_line.HasSwitch(switches::kDisableJavaScript) &&
         prefs->GetBoolean(prefs::kWebKitJavascriptEnabled);
     web_prefs.web_security_enabled =
         !command_line.HasSwitch(switches::kDisableWebSecurity) &&
         prefs->GetBoolean(prefs::kWebKitWebSecurityEnabled);
-#if defined(OS_WIN)
+#if defined(OS_WIN) or defined(OS_MACOSX)
     web_prefs.plugins_enabled =
         !command_line.HasSwitch(switches::kDisablePlugins) &&
         prefs->GetBoolean(prefs::kWebKitPluginsEnabled);
 #else
     web_prefs.plugins_enabled =
         command_line.HasSwitch(switches::kEnablePlugins) &&
         prefs->GetBoolean(prefs::kWebKitPluginsEnabled);
 #endif
     web_prefs.java_enabled =
         !command_line.HasSwitch(switches::kDisableJava) &&
@@ skipping 32 matching lines @@
   }
   DCHECK(!web_prefs.default_encoding.empty());
 
   if (is_dom_ui) {
     web_prefs.loads_images_automatically = true;
     web_prefs.javascript_enabled = true;
   }
 
   return web_prefs;
 }