[Media Router] Wiring for searching route providers for new sinks.

chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc

Index: chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
diff --git a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
index 35a23d4cc56a51c9bb3a8bab010842739530d2ef..c84ce50b918f78d1069a07a1d0af8e57a89bbde1 100644
--- a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
+++ b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
@@ -58,6 +58,7 @@ const char kReportSelectedCastMode[] = "reportSelectedCastMode";
 const char kReportSinkCount[] = "reportSinkCount";
 const char kReportTimeToClickSink[] = "reportTimeToClickSink";
 const char kReportTimeToInitialActionClose[] = "reportTimeToInitialActionClose";
+const char kSearchProviders[] = "searchProviders";
 const char kOnInitialDataReceived[] = "onInitialDataReceived";
 
 // JS function names.
@@ -372,6 +373,10 @@ void MediaRouterWebUIMessageHandler::RegisterMessages() {
           &MediaRouterWebUIMessageHandler::OnReportTimeToInitialActionClose,
           base::Unretained(this)));
   web_ui()->RegisterMessageCallback(
+      kSearchProviders,
+      base::Bind(&MediaRouterWebUIMessageHandler::OnSearchProviders,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
       kOnInitialDataReceived,
       base::Bind(&MediaRouterWebUIMessageHandler::OnInitialDataReceived,
                  base::Unretained(this)));
@@ -719,6 +724,32 @@ void MediaRouterWebUIMessageHandler::OnReportTimeToInitialActionClose(
                       base::TimeDelta::FromMillisecondsD(time_to_close));
 }
 
+void MediaRouterWebUIMessageHandler::OnSearchProviders(
+    const base::ListValue* args) {
+  DVLOG(1) << "OnSearchProviders";
+  const base::DictionaryValue* args_dict = nullptr;
+  std::string sink_id;
+  int cast_mode_num = -1;
+  if (!args->GetDictionary(0, &args_dict) ||
+      !args_dict->GetString("sinkId", &sink_id) ||
+      !args_dict->GetInteger("selectedCastMode", &cast_mode_num)) {
+    DVLOG(1) << "Unable to extract args";
+    return;
+  }
+
+  if (sink_id.empty()) {
+    DVLOG(1) << "Media Router UI did not provide a valid sink ID. Aborting";
+  }
+
+  if (!IsValidCastModeNum(cast_mode_num)) {
+    DVLOG(1) << "Invalid cast mode: " << cast_mode_num << ". Aborting.";
+    return;
+  }
+
+  media_router_ui_->SearchProviders(sink_id,
+                                    static_cast<MediaCastMode>(cast_mode_num));
+}
+
 void MediaRouterWebUIMessageHandler::OnInitialDataReceived(
     const base::ListValue* args) {
   DVLOG(1) << "OnInitialDataReceived";