Remove dependency on //content from history DownloadDatabase

components/history/content/browser/BUILD.gn

-# Copyright 2014 The Chromium Authors. All rights reserved.
+# Copyright 2015 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("test") {
+static_library("browser") {
   sources = [
-    "history_client_fake_bookmarks.cc",
-    "history_client_fake_bookmarks.h",
+    "download_constants_utils.cc",
+    "download_constants_utils.h",
   ]
 
   deps = [
     "//base",
     "//components/history/core/browser",
-    "//url",
+    "//content/public/browser",
   ]
 }