Replace "using namespace" statement with individual "using" statements

components/nacl/loader/nonsfi/nonsfi_sandbox.cc

 // Copyright 2014 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 "components/nacl/loader/nonsfi/nonsfi_sandbox.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/net.h>
 #include <sys/prctl.h>
@@ skipping 10 matching lines @@
 #include "sandbox/linux/bpf_dsl/bpf_dsl.h"
 #include "sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.h"
 #include "sandbox/linux/seccomp-bpf/sandbox_bpf_policy.h"
 #include "sandbox/linux/services/linux_syscalls.h"
 
 #if defined(__arm__) && !defined(MAP_STACK)
 // Chrome OS Daisy (ARM) build environment has old headers.
 #define MAP_STACK 0x20000
 #endif
 
-using namespace sandbox::bpf_dsl;
 using sandbox::CrashSIGSYS;
 using sandbox::CrashSIGSYSClone;
 using sandbox::CrashSIGSYSPrctl;
+using sandbox::bpf_dsl::Allow;
+using sandbox::bpf_dsl::Arg;
+using sandbox::bpf_dsl::Error;
+using sandbox::bpf_dsl::If;
+using sandbox::bpf_dsl::ResultExpr;
+
+// TODO(mdempsky): Make BoolExpr a standalone class so these operators can
+// be resolved via argument-dependent lookup.
+using sandbox::bpf_dsl::operator&&;
+using sandbox::bpf_dsl::operator||;
 
 namespace nacl {
 namespace nonsfi {
 namespace {
 
 ResultExpr RestrictFcntlCommands() {
   const Arg<int> cmd(1);
   const Arg<long> long_arg(2);
 
   // We allow following cases:
@@ skipping 251 matching lines @@
       scoped_ptr<sandbox::SandboxBPFPolicy>(
           new nacl::nonsfi::NaClNonSfiBPFSandboxPolicy()));
   if (!sandbox_is_initialized)
     return false;
   RunSandboxSanityChecks();
   return true;
 }
 
 }  // namespace nonsfi
 }  // namespace nacl