Add FilePath to base namespace.

webkit/fileapi/file_system_file_util_proxy.cc

Index: webkit/fileapi/file_system_file_util_proxy.cc
diff --git a/webkit/fileapi/file_system_file_util_proxy.cc b/webkit/fileapi/file_system_file_util_proxy.cc
index 35c08bf9c0fb06bfdfe6c0e502c6bf29560e2866..8ab1c4fe721ae38b62da4455c5a01bfb7e03543b 100644
--- a/webkit/fileapi/file_system_file_util_proxy.cc
+++ b/webkit/fileapi/file_system_file_util_proxy.cc
@@ -79,7 +79,7 @@ class GetFileInfoHelper {
  private:
   base::PlatformFileError error_;
   base::PlatformFileInfo file_info_;
-  FilePath platform_path_;
+  base::FilePath platform_path_;
   FileSystemFileUtil::SnapshotFilePolicy snapshot_policy_;
   DISALLOW_COPY_AND_ASSIGN(GetFileInfoHelper);
 };
@@ -181,7 +181,7 @@ bool FileSystemFileUtilProxy::MoveFileLocal(
 bool FileSystemFileUtilProxy::CopyInForeignFile(
     FileSystemOperationContext* context,
     FileSystemFileUtil* file_util,
-    const FilePath& src_local_disk_file_path,
+    const base::FilePath& src_local_disk_file_path,
     const FileSystemURL& dest_url,
     const StatusCallback& callback) {
   return base::PostTaskAndReplyWithResult(