Move file_util::Delete to the base namespace

chrome/test/webdriver/webdriver_automation.cc

Index: chrome/test/webdriver/webdriver_automation.cc
diff --git a/chrome/test/webdriver/webdriver_automation.cc b/chrome/test/webdriver/webdriver_automation.cc
index 2c2f13d0ea4dbcb50a5bb49962db928e31c088e9..418e0b2ac749c64cd68573fd7888785e150adec2 100644
--- a/chrome/test/webdriver/webdriver_automation.cc
+++ b/chrome/test/webdriver/webdriver_automation.cc
@@ -440,7 +440,7 @@ void Automation::Init(
 #elif defined(OS_POSIX)
     base::FilePath temp_file;
     if (!file_util::CreateTemporaryFile(&temp_file) ||
-        !file_util::Delete(temp_file, false /* recursive */)) {
+        !base::Delete(temp_file, false /* recursive */)) {
       *error = new Error(kUnknownError, "Could not create temporary filename");
       return;
     }