Linux: remove unmaintained SELinux code.

content/zygote/zygote_linux.cc

Index: content/zygote/zygote_linux.cc
diff --git a/content/zygote/zygote_linux.cc b/content/zygote/zygote_linux.cc
index 5d26a0535619971c950e0ed454b53b555f9d24ce..893002281218e863a33bfeca97cab5f949d23efe 100644
--- a/content/zygote/zygote_linux.cc
+++ b/content/zygote/zygote_linux.cc
@@ -30,11 +30,6 @@
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_switches.h"
 
-#if defined(CHROMIUM_SELINUX)
-#include <selinux/context.h>
-#include <selinux/selinux.h>
-#endif
-
 // See http://code.google.com/p/chromium/wiki/LinuxZygote
 
 namespace content {
@@ -45,26 +40,6 @@ namespace {
 void SIGCHLDHandler(int signal) {
 }
 
-#if defined(CHROMIUM_SELINUX)
-void SELinuxTransitionToTypeOrDie(const char* type) {
-  security_context_t security_context;
-  if (getcon(&security_context))
-    LOG(FATAL) << "Cannot get SELinux context";
-
-  context_t context = context_new(security_context);
-  context_type_set(context, type);
-  const int r = setcon(context_str(context));
-  context_free(context);
-  freecon(security_context);
-
-  if (r) {
-    LOG(FATAL) << "dynamic transition to type '" << type << "' failed. "
-                  "(this binary has been built with SELinux support, but maybe "
-                  "the policies haven't been loaded into the kernel?)";
-  }
-}
-#endif  // CHROMIUM_SELINUX
-
 }  // namespace
 
 const int Zygote::kMagicSandboxIPCDescriptor;
@@ -441,10 +416,6 @@ base::ProcessId Zygote::ReadArgsAndFork(const Pickle& pickle,
       close(kZygoteIdFd);  // Another socket from the browser.
     base::GlobalDescriptors::GetInstance()->Reset(mapping);
 
-#if defined(CHROMIUM_SELINUX)
-    SELinuxTransitionToTypeOrDie("chromium_renderer_t");
-#endif
-
     // Reset the process-wide command line to our new command line.
     CommandLine::Reset();
     CommandLine::Init(0, NULL);