Move StringPiece into the base namespace. It is colliding

webkit/tools/test_shell/test_worker/test_worker_main.cc

 // Copyright (c) 2009 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 "config.h"
 
 #undef LOG
 
 #include "base/at_exit.h"
 #include "base/gfx/native_widget_types.h"
@@ skipping 148 matching lines @@
     ResourceType::Type request_type,
     int appcache_host_id,
     int routing_id) {
   return NULL;
 }
 
 string16 GetLocalizedString(int message_id) {
   return EmptyString16();
 }
 
-StringPiece GetDataResource(int resource_id) {
-  return StringPiece();
+base::StringPiece GetDataResource(int resource_id) {
+  return base::StringPiece();
 }
 
 void SetMediaPlayerAvailable(bool value) {
 }
 
 bool IsMediaPlayerAvailable() {
   return false;
 }
 
 void PrecacheUrl(const char16* url, int url_length) {
@@ skipping 62 matching lines @@
 bool DownloadUrl(const std::string& url, HWND caller_window) {
   return false;
 }
 #endif
 
 }  // namespace webkit_glue
 
 #if defined(COMPILER_GCC)
 #pragma GCC visibility pop
 #endif