Introduce a Doodle Fetcher for NTP

components/doodle/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.
+
+static_library("doodle") {
+  sources = [
+    "doodle_fetcher.cc",
+    "doodle_fetcher.h",
+  ]
+
+  deps = [
+    "//base",
+    "//net",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "doodle_fetcher_unittest.cc",
+  ]
+
+  deps = [
+    ":doodle",
+    "//net:test_support",
+    "//ui/base",
+  ]
+}