Move content's a plugin, ppapi_plugin, utility, and worker subdirectories to the content namespace.

content/plugin/plugin_interpose_util_mac.mm

 // 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/plugin/plugin_interpose_util_mac.h"
 
 #import <AppKit/AppKit.h>
 #import <objc/runtime.h>
 
 #include "content/common/plugin_messages.h"
 #include "content/plugin/plugin_thread.h"
 #include "webkit/plugins/npapi/webplugin_delegate_impl.h"
 
+using content::PluginThread;
+
 namespace mac_plugin_interposing {
 
 // TODO(stuartmorgan): Make this an IPC to order the plugin process above the
 // browser process only if the browser is current frontmost.
 __attribute__((visibility("default")))
 void SwitchToPluginProcess() {
   ProcessSerialNumber this_process, front_process;
   if ((GetCurrentProcess(&this_process) != noErr) ||
       (GetFrontProcess(&front_process) != noErr)) {
     return;
@@ skipping 256 matching lines @@
   Class nscursor_class = [NSCursor class];
   ExchangeMethods(nscursor_class, NO, @selector(set),
                   @selector(chromePlugin_set));
   ExchangeMethods(nscursor_class, YES, @selector(hide),
                   @selector(chromePlugin_hide));
   ExchangeMethods(nscursor_class, YES, @selector(unhide),
                   @selector(chromePlugin_unhide));
 }
 
 }  // namespace mac_plugin_interposing