Remove 'Enable tap-to-click' checkbox for non-touchpad devices.

chrome/browser/chromeos/system/touchpad_settings.cc

Index: chrome/browser/chromeos/system/touchpad_settings.cc
===================================================================
--- chrome/browser/chromeos/system/touchpad_settings.cc	(revision 104953)
+++ chrome/browser/chromeos/system/touchpad_settings.cc	(working copy)
@@ -19,26 +19,26 @@
 namespace touchpad_settings {
 namespace {
 const char* kTpControl = "/opt/google/touchpad/tpcontrol";
-}  // namespace
 
 // Launches the tpcontrol command asynchronously, if it exists.
 void LaunchTpControl(const std::vector<std::string>& argv) {
-  if (!system::runtime_environment::IsRunningOnChromeOS()) {
-    // Do nothing on Linux desktop, as the command does not exist.
+  if (!TouchpadExists())
     return;
-  }
 
-  if (!file_util::PathExists(FilePath(argv[0]))) {
-    LOG(ERROR) << argv[0] << " not found";
-    return;
-  }
-
   base::LaunchOptions options;
   options.wait = false;  // Launch asynchronously.
 
   base::LaunchProcess(CommandLine(argv), options, NULL);
 }
 
+}  // namespace
+
+bool TouchpadExists() {
+  // Do nothing on Linux desktop, as the command does not exist.
+  return system::runtime_environment::IsRunningOnChromeOS() &&
+      file_util::PathExists(FilePath(kTpControl));

[DaveMoore, 2011/10/13 00:04:43]

This file exists even on devices with no touchpad.

[achuithb, 2011/10/13 00:06:44]

How do you tell if there's no touchpad then?

+}
+
 void SetSensitivity(int value) {
   // Run this on the FILE thread.
   if (!BrowserThread::CurrentlyOn(BrowserThread::FILE)) {