Revert of [Presentation API / Media Router] Clean up default pres URL logic.

chrome/browser/media/router/create_presentation_session_request.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 "chrome/browser/media/router/create_presentation_session_request.h"
+
+#include "chrome/browser/media/router/media_source_helper.h"
+
+using content::PresentationSessionInfo;
+using content::PresentationError;
+
+namespace media_router {
+
+CreatePresentationSessionRequest::CreatePresentationSessionRequest(
+    const std::string& presentation_url,
+    const GURL& frame_url,
+    const PresentationSessionSuccessCallback& success_cb,
+    const PresentationSessionErrorCallback& error_cb)
+    : media_source_(MediaSourceForPresentationUrl(presentation_url)),
+      frame_url_(frame_url),
+      success_cb_(success_cb),
+      error_cb_(error_cb),
+      cb_invoked_(false) {
+  DCHECK(!success_cb.is_null());
+  DCHECK(!error_cb.is_null());
+}
+
+CreatePresentationSessionRequest::~CreatePresentationSessionRequest() {
+  if (!cb_invoked_) {
+    error_cb_.Run(content::PresentationError(
+        content::PRESENTATION_ERROR_UNKNOWN, "Unknown error."));
+  }
+}
+
+void CreatePresentationSessionRequest::InvokeSuccessCallback(
+    const std::string& presentation_id,
+    const MediaRoute::Id& route_id) {
+  DCHECK(!cb_invoked_);
+  if (!cb_invoked_) {
+    // Overwrite presentation ID.
+    success_cb_.Run(
+        content::PresentationSessionInfo(
+            PresentationUrlFromMediaSource(media_source_), presentation_id),
+        route_id);
+    cb_invoked_ = true;
+  }
+}
+
+void CreatePresentationSessionRequest::InvokeErrorCallback(
+    const content::PresentationError& error) {
+  DCHECK(!cb_invoked_);
+  if (!cb_invoked_) {
+    error_cb_.Run(error);
+    cb_invoked_ = true;
+  }
+}
+
+// static
+void CreatePresentationSessionRequest::HandleRouteResponse(
+    scoped_ptr<CreatePresentationSessionRequest> presentation_request,
+    const MediaRoute* route,
+    const std::string& presentation_id,
+    const std::string& error) {
+  if (!route) {
+    presentation_request->InvokeErrorCallback(
+        content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN, error));
+  } else {
+    presentation_request->InvokeSuccessCallback(presentation_id,
+                                                route->media_route_id());
+  }
+}
+
+}  // namespace media_router