Move SafeBrowsingUIManager::UnsafeResource to security_interstitials namespace

components/security_interstitials/content/BUILD.gn

Index: components/security_interstitials/content/BUILD.gn
diff --git a/components/security_interstitials/content/BUILD.gn b/components/security_interstitials/content/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..b5632d2d0ca2cdc490de3d96c6b3672912f148c2
--- /dev/null
+++ b/components/security_interstitials/content/BUILD.gn
@@ -0,0 +1,17 @@
+# 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.
+
+static_library("unsafe_resource") {
+  sources = [
+    "unsafe_resource.cc",
+    "unsafe_resource.h",
+  ]
+
+  deps = [
+    "//base",
+    "//components/safe_browsing_db:hit_report",
+    "//components/safe_browsing_db:util",
+    "//content/public/browser",
+  ]
+}