Created fakes for HID-detection screen testing. Initial browsertest added.

device/hid/input_service_linux.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 "device/hid/input_service_linux.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 72 matching lines @@
  private:
   friend class InputServiceLinux;
 
   InputServiceLinuxImpl();
   ~InputServiceLinuxImpl() override;
 
   DISALLOW_COPY_AND_ASSIGN(InputServiceLinuxImpl);
 };
 
 InputServiceLinuxImpl::InputServiceLinuxImpl() {
+  base::ThreadRestrictions::AssertIOAllowed();
+  base::MessageLoop::current()->AddDestructionObserver(this);
+
   DeviceMonitorLinux::GetInstance()->AddObserver(this);
   DeviceMonitorLinux::GetInstance()->Enumerate(base::Bind(
       &InputServiceLinuxImpl::OnDeviceAdded, base::Unretained(this)));
 }
 
 InputServiceLinuxImpl::~InputServiceLinuxImpl() {
   if (DeviceMonitorLinux::HasInstance())
     DeviceMonitorLinux::GetInstance()->RemoveObserver(this);
+  base::MessageLoop::current()->RemoveDestructionObserver(this);
 }
 
 void InputServiceLinuxImpl::OnDeviceAdded(udev_device* device) {
   DCHECK(CalledOnValidThread());
   if (!device)
     return;
   const char* devnode = udev_device_get_devnode(device);
   if (!devnode)
     return;
 
@@ skipping 44 matching lines @@
       is_accelerometer(false),
       is_joystick(false),
       is_key(false),
       is_keyboard(false),
       is_mouse(false),
       is_tablet(false),
       is_touchpad(false),
       is_touchscreen(false) {}
 
 InputServiceLinux::InputServiceLinux() {
-  base::ThreadRestrictions::AssertIOAllowed();
-  base::MessageLoop::current()->AddDestructionObserver(this);
 }
 
 InputServiceLinux::~InputServiceLinux() {
   DCHECK(CalledOnValidThread());
-  base::MessageLoop::current()->RemoveDestructionObserver(this);
 }
 
 // static
 InputServiceLinux* InputServiceLinux::GetInstance() {
   if (!HasInstance())
     g_input_service_linux_ptr.Get().reset(new InputServiceLinuxImpl());
   return g_input_service_linux_ptr.Get().get();
 }
 
 // static
@@ skipping 49 matching lines @@
 void InputServiceLinux::RemoveDevice(const std::string& id) {
   devices_.erase(id);
   FOR_EACH_OBSERVER(Observer, observers_, OnInputDeviceRemoved(id));
 }
 
 bool InputServiceLinux::CalledOnValidThread() const {
   return thread_checker_.CalledOnValidThread();
 }
 
 }  // namespace device