PNaCl: Use Chrome IPC to talk to the linker process, instead of SRPC

components/nacl/renderer/plugin/pnacl_translate_thread.h

Index: components/nacl/renderer/plugin/pnacl_translate_thread.h
diff --git a/components/nacl/renderer/plugin/pnacl_translate_thread.h b/components/nacl/renderer/plugin/pnacl_translate_thread.h
index ca06d3df70644cb129153ab7e4822f6917902c71..e862492ad5f4ce5e5675b68640dcaf9040bf6874 100644
--- a/components/nacl/renderer/plugin/pnacl_translate_thread.h
+++ b/components/nacl/renderer/plugin/pnacl_translate_thread.h
@@ -14,6 +14,7 @@
 #include "native_client/src/shared/platform/nacl_sync_checked.h"
 #include "native_client/src/shared/platform/nacl_threads.h"
 #include "ppapi/cpp/completion_callback.h"
+#include "ppapi/proxy/serialized_handle.h"
 
 struct PP_PNaClOptions;
 
@@ -81,6 +82,9 @@ class PnaclTranslateThread {
   bool started() const { return coordinator_ != NULL; }
 
  private:
+  ppapi::proxy::SerializedHandle GetHandleForSubprocess(TempFile* file,
+                                                        int32_t open_flags);
+
   // Helper thread entry point for compilation. Takes a pointer to
   // PnaclTranslateThread and calls DoCompile().
   static void WINAPI DoCompileThread(void* arg);
@@ -146,6 +150,15 @@ class PnaclTranslateThread {
   PP_PNaClOptions* pnacl_options_;
   std::string architecture_attributes_;
   PnaclCoordinator* coordinator_;
+
+  // This IPC::SyncChannel can only be used and freed by the parent thread.
+  scoped_ptr<IPC::SyncChannel> ld_channel_;
+  // This IPC::SyncMessageFilter can be used by the child thread.
+  scoped_refptr<IPC::SyncMessageFilter> ld_channel_filter_;
+  // PID of the subprocess, needed for copying handles to the subprocess on
+  // Windows.  This is used by the child thread.
+  base::ProcessId ld_channel_peer_pid_;
+
  private:
   NACL_DISALLOW_COPY_AND_ASSIGN(PnaclTranslateThread);
 };