[WIP] attempt to allow chrome OS to inject its wifi data provider

chrome/browser/geolocation/wifi_data_provider_chromeos.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.
 
 // Provides wifi scan API binding for chromeos, using proprietary APIs.
 
 #include "chrome/browser/geolocation/wifi_data_provider_chromeos.h"
 
 #include "base/bind.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
+namespace chromeos {
 namespace {
 // The time periods between successive polls of the wifi data.
 const int kDefaultPollingIntervalMilliseconds = 10 * 1000;  // 10s
 const int kNoChangePollingIntervalMilliseconds = 2 * 60 * 1000;  // 2 mins
 const int kTwoNoChangePollingIntervalMilliseconds = 10 * 60 * 1000;  // 10 mins
 const int kNoWifiPollingIntervalMilliseconds = 20 * 1000; // 20s
 
-WifiDataProviderImplBase* ChromeOSFactoryFunction() {
-  return new WifiDataProviderChromeOs();
-}
-
-// This global class forces code that links in this file to use that as a data
-// provider instead of the default Linux provider.
-class RegisterChromeOSWifiDataProvider {
- public:
-  RegisterChromeOSWifiDataProvider() {
-    WifiDataProvider::SetFactory(ChromeOSFactoryFunction);
-  }
-};
-
-RegisterChromeOSWifiDataProvider g_force_chrome_os_provider;
-
-}  // namespace
-
-namespace chromeos {
-namespace {
 // Wifi API binding to network_library.h, to allow reuse of the polling behavior
 // defined in WifiDataProviderCommon.
 class NetworkLibraryWlanApi : public WifiDataProviderCommon::WlanApiInterface {
  public:
   // Does not transfer ownership, |lib| must remain valid for lifetime of
   // this object.
   explicit NetworkLibraryWlanApi(NetworkLibrary* lib);
   ~NetworkLibraryWlanApi();
 
   // WifiDataProviderCommon::WlanApiInterface
@@ skipping 179 matching lines @@
   DCHECK(CalledOnClientThread());
   DCHECK(!started_);
   started_ = true;
   // Perform first scan ASAP regardless of the polling policy. If this scan
   // fails we'll retry at a rate in line with the polling policy.
   BrowserThread::PostTask(
       BrowserThread::UI,
       FROM_HERE,
       base::Bind(&WifiDataProviderChromeOs::DoStartTaskOnUIThread, this));
 }
+
+WifiDataProviderImplBase* WifiDataProvider::DefaultFactoryFunction() {
+  return new WifiDataProviderChromeOs();
+}