Move GetFileSize, NormalizeFilePath to base namespace

media/base/container_names_unittest.cc

Index: media/base/container_names_unittest.cc
diff --git a/media/base/container_names_unittest.cc b/media/base/container_names_unittest.cc
index 21f80af6d987874aef3eacccba50022206f55bb7..0cd2c3c3c7e1ca48adf9144992bfac43cea97c2e 100644
--- a/media/base/container_names_unittest.cc
+++ b/media/base/container_names_unittest.cc
@@ -109,7 +109,7 @@ void TestFile(MediaContainerName expected, const base::FilePath& filename) {
   // so use file length if file less than 8192 bytes (http://crbug.com/243885).
   int read_size = sizeof(buffer);
   int64 actual_size;
-  if (file_util::GetFileSize(filename, &actual_size) && actual_size < read_size)
+  if (base::GetFileSize(filename, &actual_size) && actual_size < read_size)
     read_size = actual_size;
   int read = file_util::ReadFile(filename, buffer, read_size);