Add more string_util functions to base namespace.

chrome/browser/pdf/pdf_extension_util.cc

 // Copyright 2015 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 "chrome/browser/pdf/pdf_extension_util.h"
 
 #include "base/strings/string_util.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/grit/browser_resources.h"
@@ skipping 20 matching lines @@
 const char kPdfResourceIdentifier[] = "google-chrome-pdf";
 #else
 const char kPdfResourceIdentifier[] = "chromium-pdf";
 #endif
 
 std::string GetManifest() {
   std::string manifest_contents =
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_PDF_MANIFEST).as_string();
   DCHECK(manifest_contents.find(kNameTag) != std::string::npos);
-  ReplaceFirstSubstringAfterOffset(
+  base::ReplaceFirstSubstringAfterOffset(
       &manifest_contents, 0, kNameTag, ChromeContentClient::kPDFPluginName);
 
   DCHECK(manifest_contents.find(kIndexTag) != std::string::npos);
   std::string index = switches::PdfMaterialUIEnabled() ?
       kMaterialIndex : kRegularIndex;
-  ReplaceSubstringsAfterOffset(&manifest_contents, 0, kIndexTag, index);
+  base::ReplaceSubstringsAfterOffset(&manifest_contents, 0, kIndexTag, index);
   return manifest_contents;
 }
 
 }  // namespace pdf_extension_util