Move FileEnumerator to its own file, do some refactoring.

chrome_frame/test/reliability/page_load_test.cc

Index: chrome_frame/test/reliability/page_load_test.cc
diff --git a/chrome_frame/test/reliability/page_load_test.cc b/chrome_frame/test/reliability/page_load_test.cc
index 59212a607c4c2a84b9a4634f8ab61a37d2ee7b8b..07af04d0e531d95e8352450dd705d5d2a61e89ba 100644
--- a/chrome_frame/test/reliability/page_load_test.cc
+++ b/chrome_frame/test/reliability/page_load_test.cc
@@ -25,6 +25,7 @@
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/file_version_info.h"
+#include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/i18n/time_formatting.h"
 #include "base/path_service.h"
@@ -332,9 +333,9 @@ class PageLoadTest : public testing::Test {
   virtual void SetUp() {
     // Initialize crash_dumps_dir_path_.
     PathService::Get(chrome::DIR_CRASH_DUMPS, &crash_dumps_dir_path_);
-    file_util::FileEnumerator enumerator(crash_dumps_dir_path_,
-                                         false,  // not recursive
-                                         file_util::FileEnumerator::FILES);
+    base::FileEnumerator enumerator(crash_dumps_dir_path_,
+                                    false,  // not recursive
+                                    base::FileEnumerator::FILES);
     for (base::FilePath path = enumerator.Next(); !path.value().empty();
          path = enumerator.Next()) {
       if (path.MatchesExtension(FILE_PATH_LITERAL(".dmp")))
@@ -411,9 +412,9 @@ class PageLoadTest : public testing::Test {
                                 NavigationMetrics* metrics) {
     int num_dumps = 0;
 
-    file_util::FileEnumerator enumerator(crash_dumps_dir_path_,
-                                         false,  // not recursive
-                                         file_util::FileEnumerator::FILES);
+    base::FileEnumerator enumerator(crash_dumps_dir_path_,
+                                    false,  // not recursive
+                                    base::FileEnumerator::FILES);
     for (base::FilePath path = enumerator.Next(); !path.value().empty();
          path = enumerator.Next()) {
       if (path.MatchesExtension(FILE_PATH_LITERAL(".dmp")) &&