touch-devices switch: documentation.

chrome/common/chrome_switches.cc

 // Copyright (c) 2010 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 "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 1363 matching lines @@
 // Sets a token in the token service, for testing.
 const char kSetToken[]                      = "set-token";
 
 // Debug only switch to specify which websocket live experiment host to be used.
 // If host is specified, it also makes initial delay shorter (5 min to 5 sec)
 // to make it faster to test websocket live experiment code.
 const char kWebSocketLiveExperimentHost[]   = "websocket-live-experiment-host";
 #endif
 
 #if defined(HAVE_XINPUT2)
+// Tells chrome to interpret events from these devices as touch events. Only
+// available with XInput 2 (i.e. X server 1.8 or above). The id's of the devices
+// can be retrieved from 'xinput list'.
 const char kTouchDevices[]                  = "touch-devices";
 #endif
 
 
 // SeccompSandboxEnabled() controls whether we are using Seccomp.
 // It is currently off by default on all platforms.
 // TODO(evan): unify all of these once we turn the seccomp sandbox always
 // on.  Also remove the #include of command_line.h above.
 
 // Disable the seccomp sandbox (Linux only)
 const char kDisableSeccompSandbox[]         = "disable-seccomp-sandbox";
 // Enable the seccomp sandbox (Linux only)
 const char kEnableSeccompSandbox[]          = "enable-seccomp-sandbox";
 
 bool SeccompSandboxEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(
              switches::kEnableSeccompSandbox);
 }
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead,
 // please put them in alphabetical order above, or in order inside the
 // appropriate ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches