Add more string_util functions to base namespace.

content/public/test/test_launcher.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/public/test/test_launcher.h"
 
 #include <map>
 #include <string>
 #include <vector>
 
@@ skipping 46 matching lines @@
 // tests that don't run automatically but are still in the same test binary.
 // This is useful so that a team that wants to run a few tests doesn't have to
 // add a new binary that must be compiled on all builds.
 const char kManualTestPrefix[] = "MANUAL_";
 
 TestLauncherDelegate* g_launcher_delegate;
 ContentMainParams* g_params;
 
 std::string RemoveAnyPrePrefixes(const std::string& test_name) {
   std::string result(test_name);
-  ReplaceSubstringsAfterOffset(&result, 0, kPreTestPrefix, std::string());
+  base::ReplaceSubstringsAfterOffset(
+      &result, 0, kPreTestPrefix, base::StringPiece());
   return result;
 }
 
 void PrintUsage() {
   fprintf(stdout,
           "Runs tests using the gtest framework, each batch of tests being\n"
           "run in their own process. Supported command-line flags:\n"
           "\n"
           " Common flags:\n"
           "  --gtest_filter=...\n"
@@ skipping 428 matching lines @@
 
 TestLauncherDelegate* GetCurrentTestLauncherDelegate() {
   return g_launcher_delegate;
 }
 
 ContentMainParams* GetContentMainParams() {
   return g_params;
 }
 
 }  // namespace content