[Android] Redirect std{in,out,err} to sockets for layout tests.

content/shell/common/layout_test/layout_test_switches.cc

 // Copyright 2016 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 "content/shell/common/layout_test/layout_test_switches.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_split.h"
 
 namespace switches {
 
 // Allow access to external pages during layout tests.
 const char kAllowExternalPages[] = "allow-external-pages";
 
+#if defined(OS_ANDROID)
+// Redirect stderr to the given port. Only supported on Android.
+const char kAndroidStderrPort[] = "android-stderr-port";
+
+// Redirect stdin to the given port. Only supported on Android.
+const char kAndroidStdinPort[] = "android-stdin-port";
+
+// Redirect stdout to the given port. Only supported on Android.
+const char kAndroidStdoutPort[] = "android-stdout-port";
+#endif // defined(OS_ANDROID)
+
 // Check whether all system dependencies for running layout tests are met.
 const char kCheckLayoutTestSysDeps[] = "check-layout-test-sys-deps";
 
 // When specified to "enable-leak-detection" command-line option,
 // causes the leak detector to cause immediate crash when found leak.
 const char kCrashOnFailure[] = "crash-on-failure";
 
 // Run devtools tests in debug mode (not bundled and minified)
 const char kDebugDevTools[] = "debug-devtools";
 
@@ skipping 20 matching lines @@
 // finished loading.
 const char kRunLayoutTest[] = "run-layout-test";
 
 // This makes us disable some web-platform runtime features so that we test
 // content_shell as if it was a stable release. It is only followed when
 // kRunLayoutTest is set. For the features' level, see
 // http://dev.chromium.org/blink/runtime-enabled-features.
 const char kStableReleaseMode[] = "stable-release-mode";
 
 }  // namespace switches