Chrome-side change to support stdout/err to postmessage debug hookup.

ppapi/native_client/src/trusted/plugin/service_runtime.h

Index: ppapi/native_client/src/trusted/plugin/service_runtime.h
diff --git a/ppapi/native_client/src/trusted/plugin/service_runtime.h b/ppapi/native_client/src/trusted/plugin/service_runtime.h
index 1d0c3bfdb30028827f8b2885a4649d69e0fbcf0f..b1bafbfe6b29249ca589e0fe22d1c9d6b57098b7 100644
--- a/ppapi/native_client/src/trusted/plugin/service_runtime.h
+++ b/ppapi/native_client/src/trusted/plugin/service_runtime.h
@@ -47,6 +47,13 @@ struct LogToJavaScriptConsoleResource {
   std::string message;
 };
 
+struct PostMessageResource {
+ public:
+  explicit PostMessageResource(std::string msg)
+      : message(msg) {}
+  std::string message;
+};
+
 struct OpenManifestEntryResource {
  public:
   OpenManifestEntryResource(std::string target_url,
@@ -100,6 +107,8 @@ class PluginReverseInterface: public nacl::ReverseInterface {
 
   virtual void Log(nacl::string message);
 
+  virtual void DoPostMessage(nacl::string message);
+
   virtual void StartupInitializationComplete();
 
   virtual bool EnumerateManifestKeys(std::set<nacl::string>* out_keys);
@@ -116,6 +125,9 @@ class PluginReverseInterface: public nacl::ReverseInterface {
   virtual void Log_MainThreadContinuation(LogToJavaScriptConsoleResource* p,
                                           int32_t err);
 
+  virtual void PostMessage_MainThreadContinuation(PostMessageResource* p,
+                                                  int32_t err);
+
   virtual void OpenManifestEntry_MainThreadContinuation(
       OpenManifestEntryResource* p,
       int32_t err);