Move the rest of test_file_util to base namespace.

net/test/run_all_unittests.cc

Index: net/test/run_all_unittests.cc
diff --git a/net/test/run_all_unittests.cc b/net/test/run_all_unittests.cc
index 96e8a3c834625145110a1bd8590d3875abebbfd8..a035057ded8aad961971479f4627fd2377dc06f6 100644
--- a/net/test/run_all_unittests.cc
+++ b/net/test/run_all_unittests.cc
@@ -33,7 +33,7 @@ int main(int argc, char** argv) {
 #if defined(OS_ANDROID)
   const base::android::RegistrationMethod kNetTestRegisteredMethods[] = {
     {"NetAndroid", net::android::RegisterJni},
-    {"TestFileUtil", file_util::RegisterContentUriTestUtils},
+    {"TestFileUtil", base::RegisterContentUriTestUtils},
     {"UrlAndroid", url::android::RegisterJni},
   };