(Not for review) Dummy C++ side Custom Controls implementation

chrome/browser/media/router/mojo/media_router_mojo_impl.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/mojo/media_router_mojo_impl.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/media/router/issues_observer.h"
 #include "chrome/browser/media/router/media_router_factory.h"
 #include "chrome/browser/media/router/media_routes_observer.h"
 #include "chrome/browser/media/router/media_sinks_observer.h"
 #include "chrome/browser/media/router/media_source_helper.h"
+#include "chrome/browser/media/router/mojo/media_route_controller.h"
 #include "chrome/browser/media/router/mojo/media_route_provider_util_win.h"
 #include "chrome/browser/media/router/mojo/media_router_mojo_metrics.h"
 #include "chrome/browser/media/router/route_message.h"
 #include "chrome/browser/media/router/route_message_observer.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/process_manager.h"
 
 #define DVLOG_WITH_INSTANCE(level) \
   DVLOG(level) << "MR #" << instance_id_ << ": "
@@ skipping 176 matching lines @@
   auto it = routes_queries_.find(media_source);
   if (it == routes_queries_.end() ||
       !(it->second->observers.might_have_observers())) {
     DVLOG_WITH_INSTANCE(1)
         << "Received route list without any active observers: " << media_source;
     return;
   }
 
   for (auto& observer : it->second->observers)
     observer.OnRoutesUpdated(routes, joinable_route_ids);
+
+  RemoveInvalidMediaRouteControllers(routes);
 }
 
 void MediaRouterMojoImpl::RouteResponseReceived(
     const std::string& presentation_id,
     bool is_incognito,
     const std::vector<MediaRouteResponseCallback>& callbacks,
     bool is_join,
     const base::Optional<MediaRoute>& media_route,
     const base::Optional<std::string>& error_text,
     RouteRequestResult::ResultCode result_code) {
@@ skipping 148 matching lines @@
     const std::string& domain,
     const MediaSinkSearchResponseCallback& sink_callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   SetWakeReason(MediaRouteProviderWakeReason::SEARCH_SINKS);
   RunOrDefer(base::Bind(&MediaRouterMojoImpl::DoSearchSinks,
                         base::Unretained(this), sink_id, source_id,
                         search_input, domain, sink_callback));
 }
 
+MediaRouteController* MediaRouterMojoImpl::GetControllerForRoute(
+    const MediaRoute::Id& route_id) {
+  auto it = route_controllers_.find(route_id);
+  if (it != route_controllers_.end())
+    return it->second.get();
+  route_controllers_[route_id] = base::MakeUnique<MediaRouteController>(
+      route_id, media_route_provider_.get(),
+      base::Bind(&MediaRouterMojoImpl::DestroyMediaRouteController,
+                 base::Unretained(this), route_id));
+  return route_controllers_[route_id].get();
+}
+
+void MediaRouterMojoImpl::DestroyMediaRouteController(
+    const MediaRoute::Id& route_id) {
+  route_controllers_.erase(route_id);
+}
+
 bool MediaRouterMojoImpl::RegisterMediaSinksObserver(
     MediaSinksObserver* observer) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   // Create an observer list for the media source and add |observer|
   // to it. Fail if |observer| is already registered.
   const std::string& source_id = observer->source().id();
   std::unique_ptr<MediaSinksQuery>& sinks_query = sinks_queries_[source_id];
   bool new_query = false;
   if (!sinks_query) {
@@ skipping 530 matching lines @@
   RunOrDefer(base::Bind(&MediaRouterMojoImpl::DoUpdateMediaSinks,
                         base::Unretained(this), source_id));
 }
 
 void MediaRouterMojoImpl::DoUpdateMediaSinks(
     const MediaSource::Id& source_id) {
   DVLOG_WITH_INSTANCE(1) << "DoUpdateMediaSinks" << source_id;
   media_route_provider_->UpdateMediaSinks(source_id);
 }
 
+void MediaRouterMojoImpl::RemoveInvalidMediaRouteControllers(
+    const std::vector<MediaRoute>& routes) {
+  auto it = route_controllers_.begin();
+  while (it != route_controllers_.end()) {
+    const MediaRoute::Id& route_id = it->first;
+    if (std::find_if(routes.begin(), routes.end(),
+                     [&route_id](const MediaRoute& route) {
+                       return route.media_route_id() == route_id;
+                     }) == routes.end()) {
+      it = route_controllers_.erase(it);
+    } else {
+      ++it;
+    }
+  }
+}
+
 }  // namespace media_router