Move ReadFileToString to the base namespace.

content/browser/devtools/devtools_http_handler_impl.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/browser/devtools/devtools_http_handler_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 330 matching lines @@
     return;
   }
 
   std::string filename = PathWithoutParams(info.path.substr(10));
   std::string mime_type = GetMimeType(filename);
 
   base::FilePath frontend_dir = delegate_->GetDebugFrontendDir();
   if (!frontend_dir.empty()) {
     base::FilePath path = frontend_dir.AppendASCII(filename);
     std::string data;
-    file_util::ReadFileToString(path, &data);
+    base::ReadFileToString(path, &data);
     server_->Send200(connection_id, data, mime_type);
     return;
   }
   if (delegate_->BundlesFrontendResources()) {
     int resource_id = DevToolsHttpHandler::GetFrontendResourceId(filename);
     if (resource_id != -1) {
       base::StringPiece data = GetContentClient()->GetDataResource(
               resource_id, ui::SCALE_FACTOR_NONE);
       server_->Send200(connection_id, data.as_string(), mime_type);
       return;
@@ skipping 500 matching lines @@
                                            host.c_str(),
                                            kPageUrlPrefix,
                                            id.c_str()));
   std::string devtools_frontend_url = GetFrontendURLInternal(
       id.c_str(),
       host);
   dictionary->SetString(kTargetDevtoolsFrontendUrlField, devtools_frontend_url);
 }
 
 }  // namespace content