Move StringPiece into the base namespace. It is colliding

chrome/test/v8_unit_test.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 <iostream>
 
 #include "base/string_util.h"
 #include "chrome/test/v8_unit_test.h"
 
 void V8UnitTest::SetUp() {
   v8::Handle<v8::ObjectTemplate> global = v8::ObjectTemplate::New();
   global->Set(v8::String::New("log"),
               v8::FunctionTemplate::New(&V8UnitTest::Log));
   context_ = v8::Context::New(NULL, global);
 }
 
-void V8UnitTest::ExecuteScriptInContext(const StringPiece& script_source,
-                                        const StringPiece& script_name) {
+void V8UnitTest::ExecuteScriptInContext(const base::StringPiece& script_source,
+                                        const base::StringPiece& script_name) {
   v8::Context::Scope context_scope(context_);
   v8::HandleScope handle_scope;
   v8::Handle<v8::String> source = v8::String::New(script_source.data(),
                                                   script_source.size());
   v8::Handle<v8::String> name = v8::String::New(script_name.data(),
                                                 script_source.size());
 
   v8::TryCatch try_catch;
   v8::Handle<v8::Script> script = v8::Script::Compile(source, name);
   // Ensure the script compiled without errors.
@@ skipping 55 matching lines @@
       first = false;
     } else {
       message += " ";
     }
     v8::String::Utf8Value str(args[i]);
     message += *str;
   }
   std::cout << message << "\n";
   return v8::Undefined();
 }