Move MediaDrmBridge provision communication to native side.

content/browser/media/android/url_provision_fetcher.cc

+// 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.
+
+#include "content/browser/media/android/url_provision_fetcher.h"
+
+#include "content/public/browser/android/provision_fetcher_factory.h"
+#include "media/base/bind_to_current_loop.h"
+#include "net/url_request/url_fetcher.h"
+
+namespace content {
+
+using net::URLFetcher;

[qinmin, 2015/11/13 19:07:40]

nit: move this out side namespace content 

[Tima Vaisburd, 2015/11/13 21:04:43]

Done.

+
+// Implementation of URLProvisionFetcher.
+
+URLProvisionFetcher::URLProvisionFetcher(
+    net::URLRequestContextGetter* context_getter)
+    : context_getter_(context_getter) {}
+
+URLProvisionFetcher::~URLProvisionFetcher() {}
+
+void URLProvisionFetcher::Retrieve(
+    const std::string& default_url,
+    const std::string& request_data,
+    const media::ProvisionFetcher::ResponseCB& response_cb) {
+  response_cb_ = response_cb;
+
+  std::string request_string = default_url + "&signedRequest=" + request_data;

[qinmin, 2015/11/13 19:07:40]

nit: consider using constants for all the const strings here.

[Tima Vaisburd, 2015/11/13 21:04:43]

Changed this to const std::string, the second one in OnURLFtechComplete() has to
be non-const.

+  DVLOG(1) << __FUNCTION__ << ": request:" << request_string;
+
+  DCHECK(!request_);
+  request_ = URLFetcher::Create(GURL(request_string), URLFetcher::POST, this);
+
+  // SetUploadData is mandatory even if we are not uploading anything.
+  request_->SetUploadData("", "");
+  request_->AddExtraRequestHeader("User-Agent: Widevine CDM v1.0");
+  request_->AddExtraRequestHeader("Content-Type: application/json");
+
+  DCHECK(context_getter_);
+  request_->SetRequestContext(context_getter_);
+
+  request_->Start();
+}
+
+void URLProvisionFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
+  DCHECK(source);

[qinmin, 2015/11/13 19:07:40]

no need

[Tima Vaisburd, 2015/11/13 21:04:43]

Xiaohan seems to encourage DCHECKs for every input parameter where applicable.
Keeping this one.

+
+  int response_code = source->GetResponseCode();
+  DVLOG(1) << __FUNCTION__ << ": response code:" << source->GetResponseCode();
+
+  std::string response;
+  bool success = false;
+  if (response_code == 200) {
+    success = source->GetResponseAsString(&response);
+    DVLOG_IF(1, !success) << __FUNCTION__ << ": GetResponseAsString() failed";
+  } else {
+    DVLOG(1) << "CDM provision: server returned error code " << response_code;
+  }
+
+  request_.reset();
+
+  DCHECK(!response_cb_.is_null());

[qinmin, 2015/11/13 19:07:40]

no need

[Tima Vaisburd, 2015/11/13 21:04:43]

Removed.

+
+  // URLFetcher implementation calls OnURLFetchComplete() on the same thread
+  // that called Start() and it does this asynchronously.
+  response_cb_.Run(success, response);
+}
+
+// Implementation of content public method CreateProvisionFetcher().
+
+scoped_ptr<media::ProvisionFetcher> CreateProvisionFetcher(
+    net::URLRequestContextGetter* context_getter) {

[xhwang, 2015/11/13 05:15:42]

DCHECK(context_getter);

[Tima Vaisburd, 2015/11/13 21:04:43]

Done.

+  return scoped_ptr<media::ProvisionFetcher>(
+      new URLProvisionFetcher(context_getter));

[xhwang, 2015/11/13 05:15:42]

will make_scoped_ptr(new URLProvisionFetcher(context_getter)) work?

[Tima Vaisburd, 2015/11/13 21:04:43]

Done.

+}
+
+}  // namespace content