Add SeccompSupportDetector for Android.

chrome/utility/chrome_content_utility_client.cc

Index: chrome/utility/chrome_content_utility_client.cc
diff --git a/chrome/utility/chrome_content_utility_client.cc b/chrome/utility/chrome_content_utility_client.cc
index d82c23bf5479e1b7cf85f27b64a0953c7d635c47..1d78ccc131650825f390805fc8043a5ada89e490 100644
--- a/chrome/utility/chrome_content_utility_client.cc
+++ b/chrome/utility/chrome_content_utility_client.cc
@@ -31,6 +31,10 @@
 #include "net/proxy/mojo_proxy_resolver_factory_impl.h"
 #endif
 
+#if defined(OS_ANDROID) && defined(USE_SECCOMP_BPF)
+#include "sandbox/linux/seccomp-bpf/sandbox_bpf.h"
+#endif
+
 #if defined(OS_WIN)
 #include "chrome/utility/font_cache_handler_win.h"
 #include "chrome/utility/shell_handler_win.h"
@@ -162,6 +166,10 @@ bool ChromeContentUtilityClient::OnMessageReceived(
 #if defined(OS_CHROMEOS)
     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_CreateZipFile, OnCreateZipFile)
 #endif
+#if defined(OS_ANDROID) && defined(USE_SECCOMP_BPF)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_DetectSeccompSupport,
+                        OnDetectSeccompSupport)
+#endif
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -277,6 +285,22 @@ void ChromeContentUtilityClient::OnCreateZipFile(
 }
 #endif  // defined(OS_CHROMEOS)
 
+#if defined(OS_ANDROID) && defined(USE_SECCOMP_BPF)
+void ChromeContentUtilityClient::OnDetectSeccompSupport() {
+  bool supports_prctl = sandbox::SandboxBPF::SupportsSeccompSandbox(
+      sandbox::SandboxBPF::SeccompLevel::SINGLE_THREADED);
+  Send(new ChromeUtilityHostMsg_DetectSeccompSupport_ResultPrctl(
+      supports_prctl));
+
+  bool supports_syscall = sandbox::SandboxBPF::SupportsSeccompSandbox(
+      sandbox::SandboxBPF::SeccompLevel::MULTI_THREADED);
+  Send(new ChromeUtilityHostMsg_DetectSeccompSupport_ResultSyscall(
+      supports_syscall));
+
+  ReleaseProcessIfNeeded();
+}
+#endif  // defined(OS_ANDROID) && defined(USE_SECCOMP_BPF)
+
 void ChromeContentUtilityClient::OnRobustJPEGDecodeImage(
     const std::vector<unsigned char>& encoded_data) {
   // Our robust jpeg decoding is using IJG libjpeg.