Move ReadFileToString to the base namespace.

chrome/test/perf/rendering/throughput_tests.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 "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
@@ skipping 140 matching lines @@
         CommandLine::ForCurrentProcess()->GetSwitchValueNative(
             switches::kExtraChromeFlags);
     if (MatchPattern(flags, FILE_PATH_LITERAL("*.json:*"))) {
       CommandLine::StringType::size_type colon_pos = flags.find_last_of(':');
       CommandLine::StringType::size_type num_pos = colon_pos + 1;
       int index;
       ASSERT_TRUE(base::StringToInt(
           flags.substr(num_pos, flags.size() - num_pos), &index));
       base::FilePath filepath(flags.substr(0, colon_pos));
       std::string json;
-      ASSERT_TRUE(file_util::ReadFileToString(filepath, &json));
+      ASSERT_TRUE(base::ReadFileToString(filepath, &json));
       ASSERT_TRUE(ParseFlagsFromJSON(filepath.DirName(), json, index));
     } else {
       gurl_ = GURL(flags);
     }
   }
 
   void AllowExternalDNS() {
     net::RuleBasedHostResolverProc* resolver =
         new net::RuleBasedHostResolverProc(host_resolver());
     resolver->AllowDirectLookup("*");
@@ skipping 429 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(ThroughputTestGPU, CanvasManyImagesGPU) {
   RunCanvasBenchTest("many_images", kNone | kIsGpuCanvasTest);
 }
 
 IN_PROC_BROWSER_TEST_F(ThroughputTestThread, CanvasManyImagesGPU) {
   RunCanvasBenchTest("many_images", kNone | kIsGpuCanvasTest);
 }
 
 }  // namespace