This CL adds client.toDataURL which gets the contents...

converter/cross/renderer_stub.cc

Index: converter/cross/renderer_stub.cc
===================================================================
--- converter/cross/renderer_stub.cc	(revision 22687)
+++ converter/cross/renderer_stub.cc	(working copy)
@@ -46,6 +46,7 @@
 #include "converter/cross/sampler_stub.h"
 #include "converter/cross/stream_bank_stub.h"
 #include "converter/cross/texture_stub.h"
+#include "utils/cross/dataurl.h"
 
 namespace o3d {
 
@@ -196,9 +197,9 @@
   return StreamBank::Ref(new StreamBankStub(service_locator()));
 }
 
-bool RendererStub::SaveScreen(const String &) {
+String RendererStub::ToDataURL() {
   DCHECK(false);
-  return true;
+  return dataurl::kEmptyDataURL;
 }
 
 ParamCache *RendererStub::CreatePlatformSpecificParamCache(void) {