Move ReadFileToString to the base namespace.

content/browser/tracing/tracing_ui.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/tracing/tracing_ui.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 207 matching lines @@
 
 void TracingMessageHandler::OnBeginRequestBufferPercentFull(
     const base::ListValue* list) {
   TraceController::GetInstance()->GetTraceBufferPercentFullAsync(this);
 }
 
 // A callback used for asynchronously reading a file to a string. Calls the
 // TaskProxy callback when reading is complete.
 void ReadTraceFileCallback(TaskProxy* proxy, const base::FilePath& path) {
   std::string file_contents;
-  if (!file_util::ReadFileToString(path, &file_contents))
+  if (!base::ReadFileToString(path, &file_contents))
     return;
 
   // We need to escape the file contents, because it will go into a javascript
   // quoted string in TracingMessageHandler::LoadTraceFileComplete. We need to
   // escape control characters (to have well-formed javascript statements), as
   // well as \ and ' (the only special characters in a ''-quoted string).
   // Do the escaping on this thread, it may take a little while for big files
   // and we don't want to block the UI during that time. Also do the UTF-16
   // conversion here.
   // Note: we're using UTF-16 because we'll need to cut the string into slices
@@ skipping 313 matching lines @@
 TracingUI::TracingUI(WebUI* web_ui) : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new TracingMessageHandler());
 
   // Set up the chrome://tracing/ source.
   BrowserContext* browser_context =
       web_ui->GetWebContents()->GetBrowserContext();
   WebUIDataSource::Add(browser_context, CreateTracingHTMLSource());
 }
 
 }  // namespace content