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

components/nacl/renderer/ppb_nacl_private_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/nacl/renderer/ppb_nacl_private_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <numeric>
 #include <string>
@@ skipping 371 matching lines @@
   STATICALLY_CHECK_NACLAPPPROCESSTYPE_EQ(PP_PNACL_TRANSLATOR_PROCESS_TYPE,
                                          kPNaClTranslatorProcessType);
   STATICALLY_CHECK_NACLAPPPROCESSTYPE_EQ(PP_NUM_NACL_PROCESS_TYPES,
                                          kNumNaClProcessTypes);
 #undef STATICALLY_CHECK_NACLAPPPROCESSTYPE_EQ
   DCHECK(pp_process_type > PP_UNKNOWN_NACL_PROCESS_TYPE &&
          pp_process_type < PP_NUM_NACL_PROCESS_TYPES);
   return static_cast<NaClAppProcessType>(pp_process_type);
 }
 
+// A dummy IPC::Listener object with a no-op message handler.  We use
+// this with an IPC::SyncChannel where we only send synchronous
+// messages and don't need to handle any messages other than sync
+// replies.
+class NoOpListener : public IPC::Listener {
+ public:
+  bool OnMessageReceived(const IPC::Message& message) override { return false; }
+  void OnChannelError() override {}
+};
+
 // Launch NaCl's sel_ldr process.
 void LaunchSelLdr(PP_Instance instance,
                   PP_Bool main_service_runtime,
                   const char* alleged_url,
                   const PP_NaClFileInfo* nexe_file_info,
                   PP_Bool uses_nonsfi_mode,
                   PP_NaClAppProcessType pp_process_type,
                   void* imc_handle,
+                  scoped_ptr<IPC::SyncChannel>* translator_channel,
+                  base::ProcessId* process_id,
                   PP_CompletionCallback callback) {
   CHECK(ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->
             BelongsToCurrentThread());
   NaClAppProcessType process_type = PP_ToNaClAppProcessType(pp_process_type);
   // Create the manifest service proxy here, so on error case, it will be
   // destructed (without passing it to ManifestServiceChannel).
   scoped_ptr<ManifestServiceChannel::Delegate> manifest_service_proxy(
       new ManifestServiceProxy(instance, process_type));
 
   IPC::Sender* sender = content::RenderThread::Get();
@@ skipping 99 matching lines @@
                    static_cast<int32_t>(PP_ERROR_FAILED)));
     return;
   }
 
   instance_info.channel_handle = launch_result.ppapi_ipc_channel_handle;
   instance_info.plugin_pid = launch_result.plugin_pid;
   instance_info.plugin_child_id = launch_result.plugin_child_id;
 
   // Don't save instance_info if channel handle is invalid.
   if (IsValidChannelHandle(instance_info.channel_handle)) {
-    NaClPluginInstance* nacl_plugin_instance = GetNaClPluginInstance(instance);
-    nacl_plugin_instance->instance_info.reset(new InstanceInfo(instance_info));
+    if (process_type == kPNaClTranslatorProcessType) {
+      // Return an IPC channel which allows communicating with a PNaCl
+      // translator process.
+      *translator_channel = IPC::SyncChannel::Create(
+          instance_info.channel_handle,
+          IPC::Channel::MODE_CLIENT,
+          new NoOpListener,
+          content::RenderThread::Get()->GetIOMessageLoopProxy(),
+          true,
+          content::RenderThread::Get()->GetShutdownEvent());
+      *process_id = launch_result.plugin_pid;
+    } else {
+      // Save the channel handle for when StartPpapiProxy() is called.
+      NaClPluginInstance* nacl_plugin_instance =
+          GetNaClPluginInstance(instance);
+      nacl_plugin_instance->instance_info.reset(
+          new InstanceInfo(instance_info));
+    }
   }
 
   *(static_cast<NaClHandle*>(imc_handle)) =
       IPC::PlatformFileForTransitToPlatformFile(
           launch_result.imc_channel_handle);
 
   // Store the crash information shared memory handle.
   load_manager->set_crash_info_shmem_handle(
       launch_result.crash_info_shmem_handle);
 
@@ skipping 1193 matching lines @@
   &StreamPexe
 };
 
 }  // namespace
 
 const PPB_NaCl_Private* GetNaClPrivateInterface() {
   return &nacl_interface;
 }
 
 }  // namespace nacl