PPAPI: Refactor MessageChannel to prep for sync postMessae

content/renderer/pepper/mock_renderer_ppapi_host.cc

Index: content/renderer/pepper/mock_renderer_ppapi_host.cc
diff --git a/content/renderer/pepper/mock_renderer_ppapi_host.cc b/content/renderer/pepper/mock_renderer_ppapi_host.cc
index da95d8f91fe7773020dd72ae7d0a5635244955a4..0f7b6e85573c45a8503b3c7c47a1444354908a8e 100644
--- a/content/renderer/pepper/mock_renderer_ppapi_host.cc
+++ b/content/renderer/pepper/mock_renderer_ppapi_host.cc
@@ -79,6 +79,14 @@ IPC::PlatformFileForTransit MockRendererPpapiHost::ShareHandleWithRemote(
 
 bool MockRendererPpapiHost::IsRunningInProcess() const { return false; }
 
+std::string MockRendererPpapiHost::GetPluginName() const {
+  return std::string();
+}
+
+void MockRendererPpapiHost::SetToExternalPluginHost() {
+  NOTIMPLEMENTED();
+}
+
 void MockRendererPpapiHost::CreateBrowserResourceHosts(
     PP_Instance instance,
     const std::vector<IPC::Message>& nested_msgs,