Move GPUFeatureChecker to content layer

content/public/browser/gpu_feature_checker.cc

Index: content/public/browser/gpu_feature_checker.cc
diff --git a/content/public/browser/gpu_feature_checker.cc b/content/public/browser/gpu_feature_checker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..afa1004b76fd5ce4b82f14f896a0f3bf67d70371
--- /dev/null
+++ b/content/public/browser/gpu_feature_checker.cc
@@ -0,0 +1,11 @@
+// Copyright 2017 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 "content/public/browser/gpu_feature_checker.h"
+
+namespace content {
+
+GpuFeatureChecker::~GpuFeatureChecker() {}
+
+}  // namespace content