[Android] Define a baseline seccomp-bpf sandbox policy.

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 26d2d5abf932c469ba91cc77c5d5cc0c0fc26fae..a3250f5cdb11a668ca0c446f334bc9f52fbb4d7a 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -356,6 +356,10 @@ const char kEnableAcceleratedFixedRootBackground[] =
 const char kEnableAcceleratedOverflowScroll[] =
     "enable-accelerated-overflow-scroll";
 
+// Enables seccomp-bpf support for Android. Requires experimental kernel
+// support. <http://crbug.com/166704>
+const char kEnableAndroidSeccompBPF[] = "enable-android-seccomp-bpf";
+
 // Enables LCD text.
 const char kEnableLCDText[]                 = "enable-lcd-text";