Refactor OAuth2TokenService to have profile- and device-based implementations.

chrome/browser/signin/android_profile_oauth2_token_service.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 "chrome/browser/signin/android_profile_oauth2_token_service.h"
+
+#include "base/bind.h"
+#include "chrome/browser/sync/profile_sync_service_android.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/url_request/url_request_context_getter.h"
+
+AndroidProfileOAuth2TokenService::AndroidProfileOAuth2TokenService(
+    net::URLRequestContextGetter* getter)
+    : ProfileOAuth2TokenService(getter) {
+}
+
+AndroidProfileOAuth2TokenService::~AndroidProfileOAuth2TokenService() {
+}
+
+scoped_ptr<OAuth2TokenService::Request>
+    AndroidProfileOAuth2TokenService::StartRequest(
+        const OAuth2TokenService::ScopeSet& scopes,
+        OAuth2TokenService::Consumer* consumer) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+
+  if (HasCacheEntry(scopes))
+    return StartCacheLookupRequest(scopes, consumer);
+
+  scoped_ptr<RequestImpl> request(new RequestImpl(consumer));
+  DCHECK_EQ(scopes.size(), 1U);
+  std::vector<std::string> scope_list(scopes.begin(), scopes.end());
+  ProfileSyncServiceAndroid* sync_service =
+      ProfileSyncServiceAndroid::GetProfileSyncServiceAndroid();
+  sync_service->FetchOAuth2Token(
+      scope_list.front(),
+      base::Bind(&OAuth2TokenService::InformConsumer,
+                 request->AsWeakPtr()));
+  return request.PassAs<Request>();
+}
+
+void AndroidProfileOAuth2TokenService::InvalidateToken(
+    const ScopeSet& scopes,
+    const std::string& invalid_token) {
+  OAuth2TokenService::InvalidateToken(scopes, invalid_token);
+
+  DCHECK_EQ(scopes.size(), 1U);
+  std::vector<std::string> scope_list(scopes.begin(), scopes.end());
+  ProfileSyncServiceAndroid* sync_service =
+      ProfileSyncServiceAndroid::GetProfileSyncServiceAndroid();
+  sync_service->InvalidateOAuth2Token(
+      scope_list.front(),
+      invalid_token);
+}
+
+bool AndroidProfileOAuth2TokenService::ShouldCacheForRefreshToken(
+    TokenService *token_service,
+    const std::string& refresh_token) {
+  // The parent class skips caching if the TokenService login token is stale,
+  // but on Android the user is always logged in to exactly one profile, so
+  // this concept doesn't exist and we can simply always cache.
+  return true;
+}