Revert 111270 - Part 1 of work to do user sign in based on OAuth2:

chrome/common/net/gaia/oauth2_access_token_fetcher.cc

Index: chrome/common/net/gaia/oauth2_access_token_fetcher.cc
===================================================================
--- chrome/common/net/gaia/oauth2_access_token_fetcher.cc	(revision 111276)
+++ chrome/common/net/gaia/oauth2_access_token_fetcher.cc	(working copy)
@@ -1,189 +0,0 @@
-// 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 "chrome/common/net/gaia/oauth2_access_token_fetcher.h"
-
-#include <algorithm>
-#include <string>
-
-#include "base/json/json_reader.h"
-#include "base/stringprintf.h"
-#include "base/values.h"
-#include "chrome/common/net/gaia/gaia_urls.h"
-#include "chrome/common/net/gaia/google_service_auth_error.h"
-#include "chrome/common/net/http_return.h"
-#include "net/base/escape.h"
-#include "net/base/load_flags.h"
-#include "net/url_request/url_request_context_getter.h"
-#include "net/url_request/url_request_status.h"
-
-using content::URLFetcher;
-using content::URLFetcherDelegate;
-using net::ResponseCookies;
-using net::URLRequestContextGetter;
-using net::URLRequestStatus;
-
-namespace {
-static const char kGetAccessTokenBodyFormat[] =
-    "client_id=%s&"
-    "client_secret=%s"
-    "grant_type=refresh_token&"
-    "refresh_token=%s";
-
-static const char kAccessTokenKey[] = "access_token";
-
-static bool GetStringFromDictionary(const DictionaryValue* dict,
-                                    const std::string& key,
-                                    std::string* value) {
-  Value* json_value;
-  if (!dict->Get(key, &json_value))
-    return false;
-  if (json_value->GetType() != base::Value::TYPE_STRING)
-    return false;
-
-  StringValue* json_str_value = static_cast<StringValue*>(json_value);
-  json_str_value->GetAsString(value);
-  return true;
-}
-
-static GoogleServiceAuthError CreateAuthError(URLRequestStatus status) {
-  CHECK(!status.is_success());
-  if (status.status() == URLRequestStatus::CANCELED) {
-    return GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED);
-  } else {
-    DLOG(WARNING) << "Could not reach Google Accounts servers: errno "
-                  << status.error();
-    return GoogleServiceAuthError::FromConnectionError(status.error());
-  }
-}
-
-static URLFetcher* CreateFetcher(URLRequestContextGetter* getter,
-                                 const GURL& url,
-                                 const std::string& body,
-                                 URLFetcherDelegate* delegate) {
-  bool empty_body = body.empty();
-  URLFetcher* result = URLFetcher::Create(
-      0, url,
-      empty_body ? URLFetcher::GET : URLFetcher::POST,
-      delegate);
-
-  result->SetRequestContext(getter);
-  result->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
-                       net::LOAD_DO_NOT_SAVE_COOKIES);
-
-  if (!empty_body)
-    result->SetUploadData("application/x-www-form-urlencoded", body);
-
-  return result;
-}
-}  // namespace
-
-OAuth2AccessTokenFetcher::OAuth2AccessTokenFetcher(
-    OAuth2AccessTokenConsumer* consumer,
-    URLRequestContextGetter* getter,
-    const std::string& source)
-    : consumer_(consumer),
-      getter_(getter),
-      source_(source),
-      state_(INITIAL) { }
-
-OAuth2AccessTokenFetcher::~OAuth2AccessTokenFetcher() { }
-
-void OAuth2AccessTokenFetcher::CancelRequest() {
-  fetcher_.reset();
-}
-
-void OAuth2AccessTokenFetcher::Start(const std::string& refresh_token) {
-  refresh_token_ = refresh_token;
-  StartGetAccessToken();
-}
-
-void OAuth2AccessTokenFetcher::StartGetAccessToken() {
-  CHECK_EQ(INITIAL, state_);
-  state_ = GET_ACCESS_TOKEN_STARTED;
-  fetcher_.reset(CreateFetcher(
-      getter_,
-      MakeGetAccessTokenUrl(),
-      MakeGetAccessTokenBody(refresh_token_),
-      this));
-  fetcher_->Start();  // OnURLFetchComplete will be called.
-}
-
-void OAuth2AccessTokenFetcher::EndGetAccessToken(const URLFetcher* source) {
-  CHECK_EQ(GET_ACCESS_TOKEN_STARTED, state_);
-  state_ = GET_ACCESS_TOKEN_DONE;
-
-  URLRequestStatus status = source->GetStatus();
-  if (!status.is_success()) {
-    ReportFailure(CreateAuthError(status));
-    return;
-  }
-
-  if (source->GetResponseCode() != RC_REQUEST_OK) {
-    ReportFailure(GoogleServiceAuthError(
-        GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS));
-    return;
-  }
-
-  // The request was successfully fetched and it returned OK.
-  // Parse out the access token.
-  std::string access_token;
-  if (!ParseGetAccessTokenResponse(source, &access_token)) {
-    ReportFailure(GoogleServiceAuthError(
-        GoogleServiceAuthError::UNEXPECTED_RESPONSE));
-    return;
-  }
-
-  ReportSuccess(access_token);
-}
-
-void OAuth2AccessTokenFetcher::ReportSuccess(const std::string& access_token) {
-  consumer_->OnGetTokenSuccess(access_token);
-}
-
-void OAuth2AccessTokenFetcher::ReportFailure(GoogleServiceAuthError error) {
-  state_ = ERROR_STATE;
-  consumer_->OnGetTokenFailure(error);
-}
-
-void OAuth2AccessTokenFetcher::OnURLFetchComplete(const URLFetcher* source) {
-  CHECK(source);
-  CHECK(state_ == GET_ACCESS_TOKEN_STARTED);
-  EndGetAccessToken(source);
-}
-
-// static
-GURL OAuth2AccessTokenFetcher::MakeGetAccessTokenUrl() {
-  return GURL(GaiaUrls::GetInstance()->oauth2_token_url());
-}
-
-// static
-std::string OAuth2AccessTokenFetcher::MakeGetAccessTokenBody(
-    const std::string& refresh_token) {
-  return StringPrintf(
-      kGetAccessTokenBodyFormat,
-      net::EscapeUrlEncodedData(
-          GaiaUrls::GetInstance()->oauth2_chrome_client_id(), true).c_str(),
-      net::EscapeUrlEncodedData(
-          GaiaUrls::GetInstance()->oauth2_chrome_client_secret(),
-              true).c_str(),
-      net::EscapeUrlEncodedData(refresh_token, true).c_str());
-}
-
-// static
-bool OAuth2AccessTokenFetcher::ParseGetAccessTokenResponse(
-    const URLFetcher* source,
-    std::string* access_token) {
-  CHECK(source);
-  CHECK(access_token);
-  std::string data;
-  source->GetResponseAsString(&data);
-  base::JSONReader reader;
-  scoped_ptr<base::Value> value(reader.Read(data, false));
-  if (!value.get() || value->GetType() != base::Value::TYPE_DICTIONARY)
-    return false;
-
-  DictionaryValue* dict = static_cast<DictionaryValue*>(value.get());
-  return GetStringFromDictionary(dict, kAccessTokenKey, access_token);
-}