Wait for toggle_touch_event_logging to exit so we don't leave zombie processes

ui/keyboard/keyboard_controller.cc

 // Copyright (c) 2013 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 "ui/keyboard/keyboard_controller.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_iterator.h"
@@ skipping 111 matching lines @@
 #if defined(OS_CHROMEOS)
   if (!base::SysInfo::IsRunningOnChromeOS())
     return;
   CommandLine command(
       base::FilePath("/opt/google/touchscreen/toggle_touch_event_logging"));
   if (enable)
     command.AppendArg("1");
   else
     command.AppendArg("0");
   VLOG(1) << "Running " << command.GetCommandLineString();
-  base::LaunchProcess(command, base::LaunchOptions(), NULL);
+  base::LaunchOptions options;
+  options.wait = true;
+  base::LaunchProcess(command, options, NULL);
 #endif
 }
 
 }  // namespace
 
 namespace keyboard {
 
 // Observer for both keyboard show and hide animations. It should be owned by
 // KeyboardController.
 class CallbackAnimationObserver : public ui::LayerAnimationObserver {
@@ skipping 316 matching lines @@
   // background during animation.
   NotifyKeyboardBoundsChanging(proxy_->GetKeyboardWindow()->bounds());
   proxy_->EnsureCaretInWorkArea();
 }
 
 void KeyboardController::HideAnimationFinished() {
   proxy_->HideKeyboardContainer(container_.get());
 }
 
 }  // namespace keyboard