Reland 2:Geolocation: move from content/browser to device/

device/geolocation/geolocation_provider_impl.cc

 // Copyright (c) 2012 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 "content/browser/geolocation/geolocation_provider_impl.h"
+#include "device/geolocation/geolocation_provider_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "base/single_thread_task_runner.h"
-#include "content/browser/geolocation/location_arbitrator_impl.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/content_browser_client.h"
-#include "content/public/browser/geolocation_delegate.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "device/geolocation/geolocation_delegate.h"
+#include "device/geolocation/location_arbitrator_impl.h"
 
-namespace content {
+namespace device {
 
 namespace {
 base::LazyInstance<std::unique_ptr<GeolocationDelegate>>::Leaky g_delegate =
     LAZY_INSTANCE_INITIALIZER;
 }  // anonymous namespace
 
 // static
 GeolocationProvider* GeolocationProvider::GetInstance() {
   return GeolocationProviderImpl::GetInstance();
 }
 
 // static
 void GeolocationProvider::SetGeolocationDelegate(
     GeolocationDelegate* delegate) {
   DCHECK(!g_delegate.Get());
   g_delegate.Get().reset(delegate);
 }
 
 std::unique_ptr<GeolocationProvider::Subscription>
 GeolocationProviderImpl::AddLocationUpdateCallback(
     const LocationUpdateCallback& callback,
     bool enable_high_accuracy) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
   std::unique_ptr<GeolocationProvider::Subscription> subscription;
   if (enable_high_accuracy) {
     subscription = high_accuracy_callbacks_.Add(callback);
   } else {
     subscription = low_accuracy_callbacks_.Add(callback);
   }
 
   OnClientsChanged();
   if (position_.Validate() ||
       position_.error_code != Geoposition::ERROR_CODE_NONE) {
     callback.Run(position_);
   }
 
   return subscription;
 }
 
 void GeolocationProviderImpl::UserDidOptIntoLocationServices() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
   bool was_permission_granted = user_did_opt_into_location_services_;
   user_did_opt_into_location_services_ = true;
   if (IsRunning() && !was_permission_granted)
     InformProvidersPermissionGranted();
 }
 
 void GeolocationProviderImpl::OverrideLocationForTesting(
     const Geoposition& position) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
   ignore_location_updates_ = true;
   NotifyClients(position);
 }
 
 void GeolocationProviderImpl::OnLocationUpdate(const Geoposition& position) {
   DCHECK(OnGeolocationThread());
   // Will be true only in testing.
   if (ignore_location_updates_)
     return;
-  BrowserThread::PostTask(BrowserThread::UI,
-                          FROM_HERE,
-                          base::Bind(&GeolocationProviderImpl::NotifyClients,
-                                     base::Unretained(this), position));
+  main_task_runner_->PostTask(
+      FROM_HERE, base::Bind(&GeolocationProviderImpl::NotifyClients,
+                            base::Unretained(this), position));
 }
 
 // static
 GeolocationProviderImpl* GeolocationProviderImpl::GetInstance() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return base::Singleton<GeolocationProviderImpl>::get();
 }
 
 GeolocationProviderImpl::GeolocationProviderImpl()
     : base::Thread("Geolocation"),
       user_did_opt_into_location_services_(false),
-      ignore_location_updates_(false) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+      ignore_location_updates_(false),
+      main_task_runner_(base::ThreadTaskRunnerHandle::Get()) {
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
   high_accuracy_callbacks_.set_removal_callback(
       base::Bind(&GeolocationProviderImpl::OnClientsChanged,
                  base::Unretained(this)));
   low_accuracy_callbacks_.set_removal_callback(
       base::Bind(&GeolocationProviderImpl::OnClientsChanged,
                  base::Unretained(this)));
 }
 
 GeolocationProviderImpl::~GeolocationProviderImpl() {
   Stop();
   DCHECK(!arbitrator_);
 }
 
 bool GeolocationProviderImpl::OnGeolocationThread() const {
   return task_runner()->BelongsToCurrentThread();
 }
 
 void GeolocationProviderImpl::OnClientsChanged() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
   base::Closure task;
   if (high_accuracy_callbacks_.empty() && low_accuracy_callbacks_.empty()) {
     DCHECK(IsRunning());
     if (!ignore_location_updates_) {
       // We have no more observers, so we clear the cached geoposition so that
       // when the next observer is added we will not provide a stale position.
       position_ = Geoposition();
     }
     task = base::Bind(&GeolocationProviderImpl::StopProviders,
                       base::Unretained(this));
@@ skipping 34 matching lines @@
         base::Bind(&GeolocationProviderImpl::InformProvidersPermissionGranted,
                    base::Unretained(this)));
     return;
   }
   DCHECK(OnGeolocationThread());
   DCHECK(arbitrator_);
   arbitrator_->OnPermissionGranted();
 }
 
 void GeolocationProviderImpl::NotifyClients(const Geoposition& position) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
   DCHECK(position.Validate() ||
          position.error_code != Geoposition::ERROR_CODE_NONE);
   position_ = position;
   high_accuracy_callbacks_.Notify(position_);
   low_accuracy_callbacks_.Notify(position_);
 }
 
 void GeolocationProviderImpl::Init() {
   DCHECK(OnGeolocationThread());
   DCHECK(!arbitrator_);
@@ skipping 10 matching lines @@
   LocationArbitratorImpl::LocationUpdateCallback callback = base::Bind(
       &GeolocationProviderImpl::OnLocationUpdate, base::Unretained(this));
   // Use the embedder's |g_delegate| or fall back to the default one.
   if (!g_delegate.Get())
     g_delegate.Get().reset(new GeolocationDelegate);
 
   return base::WrapUnique(
       new LocationArbitratorImpl(callback, g_delegate.Get().get()));
 }
 
-}  // namespace content
+}  // namespace device