Move DownloadControllerAndroid from content/ to chrome/

chrome/browser/android/download/download_controller_base.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/android/download/download_controller_base.h"
+#include "chrome/common/chrome_content_client.h"
+#include "content/public/browser/resource_request_info.h"
+#include "net/url_request/url_request.h"
+
+// static
+DownloadControllerBase* DownloadControllerBase::download_controller_ = nullptr;
+
+using content::ResourceRequestInfo;
+
+DownloadInfo::DownloadInfo(const net::URLRequest* request)
+        : has_user_gesture(false) {

[qinmin, 2016/06/13 18:31:44]

nit: fix indent

[Jinsuk Kim, 2016/06/14 00:55:58]

Done.

+  request->GetResponseHeaderByName("content-disposition", &content_disposition);
+
+  if (request->response_headers())
+      request->response_headers()->GetMimeType(&original_mime_type);

[qinmin, 2016/06/13 18:31:44]

ditto

[Jinsuk Kim, 2016/06/14 00:55:58]

Done.

+
+  request->extra_request_headers().GetHeader(
+      net::HttpRequestHeaders::kUserAgent, &user_agent);
+  if (user_agent.empty())
+      user_agent = GetUserAgent();

[qinmin, 2016/06/13 18:31:44]

ditto here and below

[Jinsuk Kim, 2016/06/14 00:55:58]

Done.

+  GURL referer_url(request->referrer());
+  if (referer_url.is_valid())
+      referer = referer_url.spec();
+  if (!request->url_chain().empty()) {
+      original_url = request->url_chain().front();
+      url = request->url_chain().back();
+  }
+
+  const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
+  if (info)
+      has_user_gesture = info->HasUserGesture();
+}
+
+DownloadInfo::DownloadInfo(const DownloadInfo& other) = default;
+
+DownloadInfo::~DownloadInfo() {}