Get rid of the link time dependency between content and chrome through the geolocation code.

chrome/browser/geolocation/access_token_store.cc

-// Copyright (c) 2011 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/access_token_store.h"
-
-#include "base/string_piece.h"
-#include "base/utf_string_conversions.h"
-#include "base/values.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/prefs/pref_service.h"
-#include "chrome/browser/prefs/scoped_user_pref_update.h"
-#include "chrome/common/pref_names.h"
-#include "content/browser/browser_thread.h"
-#include "googleurl/src/gurl.h"
-
-namespace {
-class ChromePrefsAccessTokenStore : public AccessTokenStore {
- public:
-  ChromePrefsAccessTokenStore();
-
- private:
-  void LoadDictionaryStoreInUIThread(
-      scoped_refptr<CancelableRequest<LoadAccessTokensCallbackType> > request);
-
-  // AccessTokenStore
-  virtual void DoLoadAccessTokens(
-      scoped_refptr<CancelableRequest<LoadAccessTokensCallbackType> > request);
-  virtual void SaveAccessToken(
-      const GURL& server_url, const string16& access_token);
-
-  DISALLOW_COPY_AND_ASSIGN(ChromePrefsAccessTokenStore);
-};
-
-ChromePrefsAccessTokenStore::ChromePrefsAccessTokenStore() {
-}
-
-void ChromePrefsAccessTokenStore::LoadDictionaryStoreInUIThread(
-      scoped_refptr<CancelableRequest<LoadAccessTokensCallbackType> > request) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  if (request->canceled())
-    return;
-  const DictionaryValue* token_dictionary =
-          g_browser_process->local_state()->GetDictionary(
-              prefs::kGeolocationAccessToken);
-
-  AccessTokenStore::AccessTokenSet access_token_set;
-  // The dictionary value could be NULL if the pref has never been set.
-  if (token_dictionary != NULL) {
-    for (DictionaryValue::key_iterator it = token_dictionary->begin_keys();
-        it != token_dictionary->end_keys(); ++it) {
-      GURL url(*it);
-      if (!url.is_valid())
-        continue;
-      token_dictionary->GetStringWithoutPathExpansion(*it,
-                                                      &access_token_set[url]);
-    }
-  }
-  request->ForwardResultAsync(MakeTuple(access_token_set));
-}
-
-void ChromePrefsAccessTokenStore::DoLoadAccessTokens(
-    scoped_refptr<CancelableRequest<LoadAccessTokensCallbackType> > request) {
-  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, NewRunnableMethod(
-      this, &ChromePrefsAccessTokenStore::LoadDictionaryStoreInUIThread,
-      request));
-}
-
-void SetAccessTokenOnUIThread(const GURL& server_url, const string16& token) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DictionaryPrefUpdate update(g_browser_process->local_state(),
-                              prefs::kGeolocationAccessToken);
-  DictionaryValue* access_token_dictionary = update.Get();
-  access_token_dictionary->SetWithoutPathExpansion(
-      server_url.spec(), Value::CreateStringValue(token));
-}
-
-void ChromePrefsAccessTokenStore::SaveAccessToken(
-      const GURL& server_url, const string16& access_token) {
-  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, NewRunnableFunction(
-      &SetAccessTokenOnUIThread, server_url, access_token));
-}
-}  // namespace
-
-AccessTokenStore::AccessTokenStore() {
-}
-
-AccessTokenStore::~AccessTokenStore() {
-}
-
-void AccessTokenStore::RegisterPrefs(PrefService* prefs) {
-  prefs->RegisterDictionaryPref(prefs::kGeolocationAccessToken);
-}
-
-AccessTokenStore::Handle AccessTokenStore::LoadAccessTokens(
-    CancelableRequestConsumerBase* consumer,
-    LoadAccessTokensCallbackType* callback) {
-  scoped_refptr<CancelableRequest<LoadAccessTokensCallbackType> > request(
-      new CancelableRequest<LoadAccessTokensCallbackType>(callback));
-  AddRequest(request, consumer);
-  DCHECK(request->handle());
-
-  DoLoadAccessTokens(request);
-  return request->handle();
-}
-
-// Creates a new access token store backed by the global chome prefs.
-AccessTokenStore* NewChromePrefsAccessTokenStore() {
-  return new ChromePrefsAccessTokenStore;
-}