Clean up WifiDataProvider(Manager)

content/browser/geolocation/wifi_data_provider.cc

 // Copyright 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 "content/browser/geolocation/wifi_data_provider.h"
 
 namespace content {
 
 WifiDataProvider::WifiDataProvider()
-    : container_(NULL), client_loop_(base::MessageLoop::current()) {
+    : client_loop_(base::MessageLoop::current()) {
   DCHECK(client_loop_);
 }
 
 WifiDataProvider::~WifiDataProvider() {
 }
 
-void WifiDataProvider::SetContainer(WifiDataProviderManager* container) {
-  container_ = container;
-}
-
 void WifiDataProvider::AddCallback(WifiDataUpdateCallback* callback) {
   callbacks_.insert(callback);
 }
 
 bool WifiDataProvider::RemoveCallback(WifiDataUpdateCallback* callback) {
   return callbacks_.erase(callback) == 1;
 }
 
 bool WifiDataProvider::has_callbacks() const {
   return !callbacks_.empty();
 }
 
 void WifiDataProvider::RunCallbacks() {
   client_loop_->PostTask(FROM_HERE,
                          base::Bind(&WifiDataProvider::DoRunCallbacks, this));
 }
 
 bool WifiDataProvider::CalledOnClientThread() const {
   return base::MessageLoop::current() == this->client_loop_;
 }
 
 base::MessageLoop* WifiDataProvider::client_loop() const {
   return client_loop_;
 }
 
 void WifiDataProvider::DoRunCallbacks() {
-  // It's possible that all the callbacks (and the container) went away
-  // whilst this task was pending. This is fine; the loop will be a no-op.
+  // It's possible that all the callbacks went away whilst this task was
+  // pending. This is fine; the loop will be a no-op.
   CallbackSet::const_iterator iter = callbacks_.begin();
   while (iter != callbacks_.end()) {
     WifiDataUpdateCallback* callback = *iter;
     ++iter;  // Advance iter before running, in case callback unregisters.
-    callback->Run(container_);
+    callback->Run();
   }
 }
 
 }  // namespace content