Add explicit base to FilePath.

content/worker/worker_webkitplatformsupport_impl.cc

 // Copyright (c) 2012 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/worker/worker_webkitplatformsupport_impl.h"
 
 #include "base/logging.h"
 #include "base/platform_file.h"
 #include "base/utf_string_conversions.h"
 #include "content/common/database_util.h"
@@ skipping 244 matching lines @@
   std::string mime_type;
   net::GetWellKnownMimeTypeFromExtension(
       webkit_base::WebStringToFilePathString(file_extension), &mime_type);
   return ASCIIToUTF16(mime_type);
 }
 
 WebString WorkerWebKitPlatformSupportImpl::mimeTypeFromFile(
     const WebString& file_path) {
   std::string mime_type;
   SendSyncMessageFromAnyThread(new MimeRegistryMsg_GetMimeTypeFromFile(
-      FilePath(webkit_base::WebStringToFilePathString(file_path)),
+      base::FilePath(webkit_base::WebStringToFilePathString(file_path)),
       &mime_type));
   return ASCIIToUTF16(mime_type);
 }
 
 WebString WorkerWebKitPlatformSupportImpl::preferredExtensionForMIMEType(
     const WebString& mime_type) {
-  FilePath::StringType file_extension;
+  base::FilePath::StringType file_extension;
   SendSyncMessageFromAnyThread(
       new MimeRegistryMsg_GetPreferredExtensionForMimeType(
           UTF16ToASCII(mime_type), &file_extension));
   return webkit_base::FilePathStringToWebString(file_extension);
 }
 
 WebBlobRegistry* WorkerWebKitPlatformSupportImpl::blobRegistry() {
   if (!blob_registry_.get())
     blob_registry_.reset(new WebBlobRegistryImpl(WorkerThread::current()));
   return blob_registry_.get();
 }
 
 }  // namespace content