Chromecast: Adds WebUI stubs for cast shell.

chromecast/shell/browser/cast_browser_main_parts.cc

Index: chromecast/shell/browser/cast_browser_main_parts.cc
diff --git a/chromecast/shell/browser/cast_browser_main_parts.cc b/chromecast/shell/browser/cast_browser_main_parts.cc
index d1a82c2625c59e982eca69a539430a5a904cd942..d5e24d7e23dcf71db716c97ac8e221b3a6b2b292 100644
--- a/chromecast/shell/browser/cast_browser_main_parts.cc
+++ b/chromecast/shell/browser/cast_browser_main_parts.cc
@@ -13,6 +13,7 @@
 #include "chromecast/shell/browser/cast_browser_context.h"
 #include "chromecast/shell/browser/devtools/remote_debugging_server.h"
 #include "chromecast/shell/browser/url_request_context_factory.h"
+#include "chromecast/shell/browser/webui/webui_cast.h"
 
 namespace chromecast {
 namespace shell {
@@ -75,6 +76,8 @@ void CastBrowserMainParts::PreMainMessageLoopRun() {
   browser_context_.reset(new CastBrowserContext(url_request_context_factory_));
   dev_tools_.reset(new RemoteDebuggingServer());
 
+  InitializeWebUI();
+
   cast_service_.reset(CastService::Create(browser_context_.get()));
   cast_service_->Start();
 }