Initial checkin of OfflineContentProvider.

components/offline_content/core/BUILD.gn

+# 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.
+
+source_set("core") {
+  sources = [
+    "offline_content_aggregator.cc",
+    "offline_content_aggregator.h",
+    "offline_content_provider.h",
+    "offline_item.cc",
+    "offline_item.h",
+
+    # TODO(dtrainor): Generate the Java version of these enums when the Android
+    # bridge is built.
+    "offline_item_file_extension.h",
+    "offline_item_filter.h",
+    "offline_item_state.h",
+  ]
+
+  deps = [
+    "//base",
+    "//url",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+
+  sources = [
+    "offline_content_aggregator_unittest.cc",
+  ]
+
+  deps = [
+    ":core",
+    "//base/test:test_support",
+    "//components/offline_content/core/test_support",
+  ]
+}