Move MediaDrmBridge provision communication to native side.

media/base/android/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 "media/base/android/provision_fetcher.h"
+
+namespace media {
+
+namespace {
+ProvisionFetcherFactory* g_factory = nullptr;

[xhwang, 2015/11/02 20:37:05]

If we use MediaClientAndroid, we don't need the factory and the global pointer
here.

[Tima Vaisburd, 2015/11/05 02:24:07]

They are completely removed. However, I added a new factory method
content::CDMProvisionFetcher::CreateWithURLContext().

+}
+
+// static
+ProvisionFetcherFactory* ProvisionFetcher::GetFactory() {
+  return g_factory;
+}
+
+// static
+void ProvisionFetcher::SetFactory(ProvisionFetcherFactory* factory) {
+  g_factory = factory;
+}
+
+}  // namespace media