Move ReadFileToString to the base namespace.

chrome/browser/chromeos/swap_metrics.cc

 // Copyright 2013 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/chromeos/swap_metrics.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/shell.h"
@@ skipping 243 matching lines @@
   counter->Add(cpu);
 }
 
 // Extracts a field value from a list of name-value pairs
 // in a file (typically a /proc or /sys file). Returns false
 // if the field is not found, or for other errors.
 bool SwapMetrics::Backend::GetFieldFromKernelOutput(const std::string& path,
                                                     const std::string& field,
                                                     int64* value) {
   std::string file_content;
-  if (!file_util::ReadFileToString(FilePath(path), &file_content)) {
+  if (!base::ReadFileToString(FilePath(path), &file_content)) {
     LOG(WARNING) << "Cannot read " << path;
     return false;
   }
   std::vector<std::string> lines;
   size_t line_count = Tokenize(file_content, "\n", &lines);
   if (line_count < 2) {
     LOG(WARNING) << "Error breaking " << path << " into lines";
     return false;
   }
   for (size_t i = 0; i < line_count; ++i) {
@@ skipping 14 matching lines @@
   LOG(WARNING) << "could not find field " << field;
   return false;
 }
 
 bool SwapMetrics::Backend::TokenizeOneLineFile(const std::string& path,
                                                size_t expected_tokens_count,
                                                const std::string& delimiters,
                                                std::vector<std::string>*
                                                tokens) {
   std::string file_content;
-  if (!file_util::ReadFileToString(FilePath(path), &file_content)) {
+  if (!base::ReadFileToString(FilePath(path), &file_content)) {
     LOG(WARNING) << "cannot read " << path;
     return false;
   }
   size_t tokens_count = Tokenize(file_content, delimiters, tokens);
   if (tokens_count != expected_tokens_count) {
     LOG(WARNING) << "unexpected content of " << path << ": " << file_content;
     return false;
   }
   return true;
 }
@@ skipping 113 matching lines @@
   if (browser_ == browser)
     return;
   if (browser_)
     browser_->tab_strip_model()->RemoveObserver(this);
   browser_ = browser;
   if (browser_)
     browser_->tab_strip_model()->AddObserver(this);
 }
 
 }  // namespace chromeos