Support permission_broker for chrome.hid devices.

device/hid/hid_service.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/hid_service.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
 #include "base/stl_util.h"
 #include "base/threading/thread_restrictions.h"
 
 #if defined(OS_LINUX) && defined(USE_UDEV)
 #include "device/hid/hid_service_linux.h"
 #elif defined(OS_MACOSX)
 #include "device/hid/hid_service_mac.h"
 #else
 #include "device/hid/hid_service_win.h"
 #endif
 
 namespace device {
 
-namespace {
+HidService* HidService::Create(
+    scoped_refptr<base::MessageLoopProxy> ui_message_loop) {
+#if defined(OS_LINUX) && defined(USE_UDEV)
+  return new HidServiceLinux(ui_message_loop);
+#elif defined(OS_MACOSX)
+  return new HidServiceMac();
+#elif defined(OS_WIN)
+  return new HidServiceWin();
+#else
+  return NULL;
+#endif
+}
 
-// The instance will be reset when message loop destroys.
-base::LazyInstance<scoped_ptr<HidService> >::Leaky g_hid_service_ptr =
-    LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
+HidService::~HidService() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
 
 void HidService::GetDevices(std::vector<HidDeviceInfo>* devices) {
   DCHECK(thread_checker_.CalledOnValidThread());
   STLClearObject(devices);
   for (DeviceMap::iterator it = devices_.begin();
       it != devices_.end();
       ++it) {
     devices->push_back(it->second);
   }
 }
 
 // Fills in the device info struct of the given device_id.
 bool HidService::GetDeviceInfo(const HidDeviceId& device_id,
                                HidDeviceInfo* info) const {
   DeviceMap::const_iterator it = devices_.find(device_id);
   if (it == devices_.end())
     return false;
   *info = it->second;
   return true;
 }
 
-void HidService::WillDestroyCurrentMessageLoop() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  g_hid_service_ptr.Get().reset(NULL);
-}
-
 HidService::HidService() {
   base::ThreadRestrictions::AssertIOAllowed();
   DCHECK(thread_checker_.CalledOnValidThread());
-  base::MessageLoop::current()->AddDestructionObserver(this);
-}
-
-HidService::~HidService() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  base::MessageLoop::current()->RemoveDestructionObserver(this);
-}
-
-HidService* HidService::CreateInstance() {
-#if defined(OS_LINUX) && defined(USE_UDEV)
-    return new HidServiceLinux();
-#elif defined(OS_MACOSX)
-    return new HidServiceMac();
-#elif defined(OS_WIN)
-    return new HidServiceWin();
-#else
-    return NULL;
-#endif
 }
 
 void HidService::AddDevice(const HidDeviceInfo& info) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!ContainsKey(devices_, info.device_id)) {
     devices_[info.device_id] = info;
   }
 }
 
 void HidService::RemoveDevice(const HidDeviceId& device_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DeviceMap::iterator it = devices_.find(device_id);
   if (it != devices_.end())
     devices_.erase(it);
 }
 
 const HidService::DeviceMap& HidService::GetDevicesNoEnumerate() const {
   return devices_;
 }
 
-HidService* HidService::GetInstance() {
-  if (!g_hid_service_ptr.Get().get())
-    g_hid_service_ptr.Get().reset(CreateInstance());
-  return g_hid_service_ptr.Get().get();
-}
-
 }  // namespace device