media: Add DefaultMediaPermission.

media/filters/default_media_permission.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/filters/default_media_permission.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/message_loop/message_loop_proxy.h"
+
+namespace media {
+
+DefaultMediaPermission::DefaultMediaPermission(bool allow) : allow_(allow) {
+}
+
+DefaultMediaPermission::~DefaultMediaPermission() {
+}
+
+static void FirePermissionStatusCallback(
+    const MediaPermission::PermissionStatusCB& permission_status_cb,
+    bool allow) {
+  LOG(WARNING) << (allow ? "Allowing" : "Denying")
+               << "media permission request with a default value instead of "
+                  "real user's consent. This should NOT be used for in a real "
+                  "user-facing product.";
+  // Return the callback asynchronously.
+  base::MessageLoopProxy::current()->PostTask(
+      FROM_HERE, base::Bind(permission_status_cb, allow));
+}
+
+void DefaultMediaPermission::HasPermission(
+    Type type,
+    const GURL& /* security_origin */,
+    const PermissionStatusCB& permission_status_cb) {
+  CHECK_EQ(PROTECTED_MEDIA_IDENTIFIER, type);
+  FirePermissionStatusCallback(permission_status_cb, allow_);
+}
+
+void DefaultMediaPermission::RequestPermission(
+    Type type,
+    const GURL& /* security_origin */,
+    const PermissionStatusCB& permission_status_cb) {
+  CHECK_EQ(PROTECTED_MEDIA_IDENTIFIER, type);
+  FirePermissionStatusCallback(permission_status_cb, allow_);
+}
+
+}  // namespace media