Create an API around PluginService and use it from Chrome.

chrome/browser/ui/cocoa/drag_util.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/drag_util.h"
 
 #include "base/file_path.h"
 #include "chrome/browser/profiles/profile.h"
-#include "content/browser/plugin_service.h"
+#include "content/public/browser/plugin_service.h"
 #include "content/public/common/url_constants.h"
 #include "googleurl/src/gurl.h"
+#include "ipc/ipc_message.h"
 #include "net/base/mime_util.h"
 #include "net/base/net_util.h"
 #import "third_party/mozilla/NSPasteboard+Utils.h"
 #import "ui/base/dragdrop/cocoa_dnd_util.h"
+#include "webkit/plugins/webplugininfo.h"
+
+using content::PluginService;
 
 namespace drag_util {
 
 namespace {
 
 BOOL IsSupportedFileURL(Profile* profile, const GURL& url) {
   FilePath full_path;
   net::FileURLToFilePath(url, &full_path);
 
   std::string mime_type;
@@ skipping 38 matching lines @@
   GURL url = GetFileURLFromDropData(info);
   if (!url.is_empty()) {
     // If dragging a file, only allow dropping supported file types (that the
     // web view can display).
     return !IsSupportedFileURL(profile, url);
   }
   return NO;
 }
 
 }  // namespace drag_util