Move Copy* into the base namespace.

chrome/browser/performance_monitor/performance_monitor_browsertest.cc

Index: chrome/browser/performance_monitor/performance_monitor_browsertest.cc
diff --git a/chrome/browser/performance_monitor/performance_monitor_browsertest.cc b/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
index 3d2c95cf3f6902c2a3c88a230f9143e5b8226629..c5aac772fd3eac11a66a278c14de802a0453fcb1 100644
--- a/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
+++ b/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
@@ -311,7 +311,7 @@ class PerformanceMonitorUncleanExitBrowserTest
 
     base::FilePath first_profile_prefs_file =
         first_profile.Append(chrome::kPreferencesFilename);
-    CHECK(file_util::CopyFile(stock_prefs_file, first_profile_prefs_file));
+    CHECK(base::CopyFile(stock_prefs_file, first_profile_prefs_file));
     CHECK(file_util::PathExists(first_profile_prefs_file));
 
     second_profile_name_ =
@@ -324,7 +324,7 @@ class PerformanceMonitorUncleanExitBrowserTest
 
     base::FilePath second_profile_prefs_file =
         second_profile.Append(chrome::kPreferencesFilename);
-    CHECK(file_util::CopyFile(stock_prefs_file, second_profile_prefs_file));
+    CHECK(base::CopyFile(stock_prefs_file, second_profile_prefs_file));
     CHECK(file_util::PathExists(second_profile_prefs_file));
 
     return true;