Create an API around PluginService and use it from Chrome.

chrome/browser/ui/cocoa/content_settings/content_setting_bubble_cocoa.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.
 
 #import "chrome/browser/ui/cocoa/content_settings/content_setting_bubble_cocoa.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/sys_string_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/ui/content_settings/content_setting_bubble_model.h"
 #import "chrome/browser/ui/cocoa/hyperlink_button_cell.h"
 #import "chrome/browser/ui/cocoa/info_bubble_view.h"
 #import "chrome/browser/ui/cocoa/l10n_util.h"
-#include "content/browser/plugin_service.h"
+#include "content/public/browser/plugin_service.h"
 #include "grit/generated_resources.h"
 #include "skia/ext/skia_utils_mac.h"
 #import "third_party/GTM/AppKit/GTMUILocalizerAndLayoutTweaker.h"
 #include "ui/base/l10n/l10n_util.h"
 
+using content::PluginService;
+
 namespace {
 
 // Must match the tag of the unblock radio button in the xib files.
 const int kAllowTag = 1;
 
 // Must match the tag of the block radio button in the xib files.
 const int kBlockTag = 2;
 
 // Height of one link in the popup list.
 const int kLinkHeight = 16;
@@ skipping 451 matching lines @@
 
 - (IBAction)manageBlocking:(id)sender {
   contentSettingBubbleModel_->OnManageLinkClicked();
 }
 
 - (IBAction)closeBubble:(id)sender {
   [self close];
 }
 
 @end  // ContentSettingBubbleController