Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/src/shared/ppapi_proxy/ppruntime.h

Index: ppapi/native_client/src/shared/ppapi_proxy/ppruntime.h
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/ppruntime.h	(revision 0)
+++ ppapi/native_client/src/shared/ppapi_proxy/ppruntime.h	(revision 0)
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2011 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PPRUNTIME_H_
+#define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PPRUNTIME_H_
+
+#include "native_client/src/include/portability.h"
+#include "native_client/src/untrusted/irt/irt_ppapi.h"
+
+EXTERN_C_BEGIN
+
+// Initialize srpc connection to the browser. Some APIs like manifest file
+// opening do not need full ppapi initialization and so can be used after
+// this function returns.
+int IrtInit();
+
+// The entry point for the main thread of the PPAPI plugin process.
+int PpapiPluginMain();
+
+void PpapiPluginRegisterThreadCreator(
+    const struct PP_ThreadFunctions* new_funcs);
+
+void PpapiPluginRegisterDefaultThreadCreator();
+
+EXTERN_C_END
+
+#endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PPRUNTIME_H_