AppShell: enable touch emulation from command line

extensions/shell/browser/shell_browser_main_parts.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 "extensions/shell/browser/shell_browser_main_parts.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/run_loop.h"
@@ skipping 49 matching lines @@
 #include "extensions/shell/browser/shell_browser_main_parts_mac.h"
 #endif
 
 #if !defined(DISABLE_NACL)
 #include "components/nacl/browser/nacl_browser.h"
 #include "components/nacl/browser/nacl_process_host.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/shell/browser/shell_nacl_browser_delegate.h"
 #endif
 
+#if defined(USE_AURA) && defined(USE_X11)
+#include "ui/events/devices/x11/touch_factory_x11.h"  // nogncheck

[Rahul Chaturvedi, 2017/01/09 18:25:40]

Add this to DEPS instead of the nogncheck.

[michaelpg, 2017/01/09 18:59:18]

Done.

+#endif
+
 using base::CommandLine;
 using content::BrowserContext;
 
 #if !defined(DISABLE_NACL)
 using content::BrowserThread;
 #endif
 
 namespace extensions {
 
 ShellBrowserMainParts::ShellBrowserMainParts(
     const content::MainFunctionParams& parameters,
     ShellBrowserMainDelegate* browser_main_delegate)
     : extension_system_(nullptr),
       parameters_(parameters),
       run_message_loop_(true),
       browser_main_delegate_(browser_main_delegate) {
 }
 
 ShellBrowserMainParts::~ShellBrowserMainParts() {
 }
 
 void ShellBrowserMainParts::PreMainMessageLoopStart() {
-  // TODO(jamescook): Initialize touch here?
+#if defined(USE_AURA) && defined(USE_X11)
+  ui::TouchFactory::SetTouchDeviceListFromCommandLine();
+#endif
 #if defined(OS_MACOSX)
   MainPartsPreMainMessageLoopStartMac();
 #endif
 }
 
 void ShellBrowserMainParts::PostMainMessageLoopStart() {
 #if defined(OS_CHROMEOS)
   // Perform initialization of D-Bus objects here rather than in the below
   // helper classes so those classes' tests can initialize stub versions of the
   // D-Bus objects.
@@ skipping 185 matching lines @@
 }
 
 void ShellBrowserMainParts::CreateExtensionSystem() {
   DCHECK(browser_context_);
   extension_system_ = static_cast<ShellExtensionSystem*>(
       ExtensionSystem::Get(browser_context_.get()));
   extension_system_->InitForRegularProfile(true);
 }
 
 }  // namespace extensions