Move //components/test_runner back into //content/shell

components/test_runner/web_frame_test_proxy.cc

Index: components/test_runner/web_frame_test_proxy.cc
diff --git a/components/test_runner/web_frame_test_proxy.cc b/components/test_runner/web_frame_test_proxy.cc
deleted file mode 100644
index bb00adea1a3431f767e4436a4582d89d8343d137..0000000000000000000000000000000000000000
--- a/components/test_runner/web_frame_test_proxy.cc
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "components/test_runner/web_frame_test_proxy.h"
-
-namespace test_runner {
-
-WebFrameTestProxyBase::WebFrameTestProxyBase() : web_frame_(nullptr) {}
-WebFrameTestProxyBase::~WebFrameTestProxyBase() {}
-
-}  // namespace test_runner