Non-SFI mode: Remove old Non-SFI code.

components/nacl/loader/nacl_helper_linux.cc

Index: components/nacl/loader/nacl_helper_linux.cc
diff --git a/components/nacl/loader/nacl_helper_linux.cc b/components/nacl/loader/nacl_helper_linux.cc
index f81323ae49815b5110258505feb0393db7723df6..010239aaa467eb986c7d65d3b9e5eb21de9cf5d0 100644
--- a/components/nacl/loader/nacl_helper_linux.cc
+++ b/components/nacl/loader/nacl_helper_linux.cc
@@ -32,8 +32,6 @@
 #include "base/process/process_handle.h"
 #include "base/rand_util.h"
 #include "components/nacl/common/nacl_switches.h"
-#include "components/nacl/loader/nacl_listener.h"
-#include "components/nacl/loader/nonsfi/nonsfi_listener.h"
 #include "components/nacl/loader/sandbox_linux/nacl_sandbox_linux.h"
 #include "content/public/common/content_descriptors.h"
 #include "content/public/common/send_zygote_child_ping_linux.h"
@@ -44,10 +42,11 @@
 #include "sandbox/linux/services/namespace_sandbox.h"
 
 #if defined(OS_NACL_NONSFI)
+#include "components/nacl/loader/nonsfi/nonsfi_listener.h"
 #include "native_client/src/public/nonsfi/irt_exception_handling.h"
 #else
 #include <link.h>
-#include "components/nacl/loader/nonsfi/irt_exception_handling.h"
+#include "components/nacl/loader/nacl_listener.h"
 #endif
 
 namespace {
@@ -57,6 +56,7 @@ struct NaClLoaderSystemInfo {
   long number_of_cores;
 };
 
+#if defined(OS_NACL_NONSFI)
 // Replace |file_descriptor| with the reading end of a closed pipe.
 void ReplaceFDWithDummy(int file_descriptor) {
   // Make sure that file_descriptor is an open descriptor.
@@ -67,6 +67,7 @@ void ReplaceFDWithDummy(int file_descriptor) {
   PCHECK(0 == IGNORE_EINTR(close(pipefd[0])));
   PCHECK(0 == IGNORE_EINTR(close(pipefd[1])));
 }
+#endif
 
 // The child must mimic the behavior of zygote_main_linux.cc on the child
 // side of the fork. See zygote_main_linux.cc:HandleForkRequest from
@@ -79,27 +80,27 @@ void BecomeNaClLoader(base::ScopedFD browser_fd,
   VLOG(1) << "NaCl loader: setting up IPC descriptor";
   // Close or shutdown IPC channels that we don't need anymore.
   PCHECK(0 == IGNORE_EINTR(close(kNaClZygoteDescriptor)));
-  // In Non-SFI mode, it's important to close any non-expected IPC channels.
-  if (uses_nonsfi_mode) {
-    // The low-level kSandboxIPCChannel is used by renderers and NaCl for
-    // various operations. See the LinuxSandbox::METHOD_* methods. NaCl uses
-    // LinuxSandbox::METHOD_MAKE_SHARED_MEMORY_SEGMENT in SFI mode, so this
-    // should only be closed in Non-SFI mode.
-    // This file descriptor is insidiously used by a number of APIs. Closing it
-    // could lead to difficult to debug issues. Instead of closing it, replace
-    // it with a dummy.
-    const int sandbox_ipc_channel =
-        base::GlobalDescriptors::kBaseDescriptor + kSandboxIPCChannel;
-
-    ReplaceFDWithDummy(sandbox_ipc_channel);
-
-    // Install crash signal handlers before disallowing system calls.
+
 #if defined(OS_NACL_NONSFI)
-    nonsfi_initialize_signal_handler();
+  // In Non-SFI mode, it's important to close any non-expected IPC channels.
+  CHECK(uses_nonsfi_mode);
+  // The low-level kSandboxIPCChannel is used by renderers and NaCl for
+  // various operations. See the LinuxSandbox::METHOD_* methods. NaCl uses
+  // LinuxSandbox::METHOD_MAKE_SHARED_MEMORY_SEGMENT in SFI mode, so this
+  // should only be closed in Non-SFI mode.
+  // This file descriptor is insidiously used by a number of APIs. Closing it
+  // could lead to difficult to debug issues. Instead of closing it, replace
+  // it with a dummy.
+  const int sandbox_ipc_channel =
+      base::GlobalDescriptors::kBaseDescriptor + kSandboxIPCChannel;
+
+  ReplaceFDWithDummy(sandbox_ipc_channel);
+
+  // Install crash signal handlers before disallowing system calls.
+  nonsfi_initialize_signal_handler();
 #else
-    nacl::nonsfi::InitializeSignalHandler();
+  CHECK(!uses_nonsfi_mode);
 #endif
-  }
 
   // Always ignore SIGPIPE, for consistency with other Chrome processes and
   // because some IPC code, such as sync_socket_posix.cc, requires this.