Chromecast: use CastContent{Browser,Renderer}Client as a base class.

chromecast/renderer/cast_content_renderer_client_simple.cc

Index: chromecast/renderer/cast_content_renderer_client_simple.cc
diff --git a/chromecast/renderer/cast_content_renderer_client_simple.cc b/chromecast/renderer/cast_content_renderer_client_simple.cc
index 5ad4fccb261cbdcd6fd15da33f6dbe1cdd5b6a16..f1d4cf2cb28746b06c32e90f097177b01c0904e8 100644
--- a/chromecast/renderer/cast_content_renderer_client_simple.cc
+++ b/chromecast/renderer/cast_content_renderer_client_simple.cc
@@ -4,11 +4,17 @@
 
 #include "chromecast/renderer/cast_content_renderer_client.h"
 
+#include "base/memory/scoped_ptr.h"
 #include "ipc/message_filter.h"
 
 namespace chromecast {
 namespace shell {
 
+// static
+scoped_ptr<CastContentRendererClient> CastContentRendererClient::Create() {
+  return make_scoped_ptr(new CastContentRendererClient());
+}
+
 void PlatformAddRendererNativeBindings(blink::WebLocalFrame* frame) {
 }