Linux: initialize the sandbox in the Plugin process.

content/common/sandbox_seccomp_bpf_linux.cc

 // Copyright (c) 2012 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 <asm/unistd.h>
 #include <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/audit.h>
 #include <linux/filter.h>
@@ skipping 1351 matching lines @@
 
   if (process_type == switches::kRendererProcess ||
       process_type == switches::kWorkerProcess) {
     return RendererOrWorkerProcessPolicy_x86_64;
   }
 
   if (process_type == switches::kUtilityProcess) {
     return BlacklistDebugAndNumaPolicy;
   }
 
+  if (process_type == switches::kPluginProcess) {
+    return AllowAllPolicy;
+  }
+
   NOTREACHED();
   // This will be our default if we need one.
   return AllowAllPolicy;
 #else
   // On other architectures (currently IA32 or ARM),
   // we only have a small blacklist at the moment.
   (void) process_type;
   return BlacklistDebugAndNumaPolicy;
 #endif  // __x86_64__
 }
@@ skipping 62 matching lines @@
       // Process-specific policy.
       ShouldEnableSeccompBpf(process_type) &&
       SupportsSandbox()) {
     return StartBpfSandbox(command_line, process_type);
   }
 #endif
   return false;
 }
 
 }  // namespace content