Move PathExists to base namespace.

chrome/browser/media/chrome_webrtc_browsertest.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 "base/file_util.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 221 matching lines @@
         "function(local) { return local.getVideoTracks()[0]; }, "
         "'video');", tab_contents);
   }
 
  private:
   void RunPeerConnectionServer() {
     base::FilePath peerconnection_server;
     EXPECT_TRUE(PathService::Get(base::DIR_MODULE, &peerconnection_server));
     peerconnection_server = peerconnection_server.Append(kPeerConnectionServer);
 
-    EXPECT_TRUE(file_util::PathExists(peerconnection_server)) <<
+    EXPECT_TRUE(base::PathExists(peerconnection_server)) <<
         "Missing peerconnection_server. You must build "
         "it so it ends up next to the browser test binary.";
     EXPECT_TRUE(base::LaunchProcess(
         CommandLine(peerconnection_server),
         base::LaunchOptions(),
         &peerconnection_server_)) << "Failed to launch peerconnection_server.";
   }
 
   void ShutdownPeerConnectionServer() {
     EXPECT_TRUE(base::KillProcess(peerconnection_server_, 0, false)) <<
@@ skipping 250 matching lines @@
                multipart_lines[25].c_str());
   EXPECT_STREQ("Content-Type: application/gzip",
                multipart_lines[26].c_str());
   EXPECT_TRUE(multipart_lines[27].empty());
   EXPECT_TRUE(multipart_lines[28].empty());  // The removed zip part.
   std::string final_delimiter = boundary;
   final_delimiter += "--";
   EXPECT_STREQ(final_delimiter.c_str(), multipart_lines[29].c_str());
   EXPECT_TRUE(multipart_lines[30].empty());
 }