Use Mojo pipes to signal sync IPC events

ppapi/proxy/ppapi_perftests.cc

Index: ppapi/proxy/ppapi_perftests.cc
diff --git a/ppapi/proxy/ppapi_perftests.cc b/ppapi/proxy/ppapi_perftests.cc
index a9138e6a2a2d90d9dcd2b013a699fe110be75eec..45b84ee6d6279517962638e660356c7b3137eef3 100644
--- a/ppapi/proxy/ppapi_perftests.cc
+++ b/ppapi/proxy/ppapi_perftests.cc
@@ -3,8 +3,10 @@
 // found in the LICENSE file.
 
 #include "base/test/perf_test_suite.h"
+#include "mojo/edk/embedder/embedder.h"
 
 int main(int argc, char** argv) {
+  mojo::edk::Init();
   return base::PerfTestSuite(argc, argv).Run();
 }