Move remaining Autofill code to //components/autofill.

chrome/browser/autofill/autofill_download.h

-// 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.
-
-#ifndef CHROME_BROWSER_AUTOFILL_AUTOFILL_DOWNLOAD_H_
-#define CHROME_BROWSER_AUTOFILL_AUTOFILL_DOWNLOAD_H_
-
-#include <stddef.h>
-#include <list>
-#include <map>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/gtest_prod_util.h"
-#include "base/time.h"
-#include "chrome/browser/autofill/autofill_type.h"
-#include "net/url_request/url_fetcher_delegate.h"
-
-class AutofillMetrics;
-class FormStructure;
-
-namespace content {
-class BrowserContext;
-}  // namespace content
-
-namespace net {
-class URLFetcher;
-}  // namespace net
-
-// Handles getting and updating Autofill heuristics.
-class AutofillDownloadManager : public net::URLFetcherDelegate {
- public:
-  enum AutofillRequestType {
-    REQUEST_QUERY,
-    REQUEST_UPLOAD,
-  };
-
-  // An interface used to notify clients of AutofillDownloadManager.
-  class Observer {
-   public:
-    // Called when field type predictions are successfully received from the
-    // server.  |response_xml| contains the server response.
-    virtual void OnLoadedServerPredictions(const std::string& response_xml) = 0;
-
-    // These notifications are used to help with testing.
-    // Called when heuristic either successfully considered for upload and
-    // not send or uploaded.
-    virtual void OnUploadedPossibleFieldTypes() {}
-    // Called when there was an error during the request.
-    // |form_signature| - the signature of the requesting form.
-    // |request_type| - type of request that failed.
-    // |http_error| - HTTP error code.
-    virtual void OnServerRequestError(const std::string& form_signature,
-                                      AutofillRequestType request_type,
-                                      int http_error) {}
-
-   protected:
-    virtual ~Observer() {}
-  };
-
-  // |observer| - observer to notify on successful completion or error.
-  AutofillDownloadManager(content::BrowserContext* context,
-                          Observer* observer);
-  virtual ~AutofillDownloadManager();
-
-  // Starts a query request to Autofill servers. The observer is called with the
-  // list of the fields of all requested forms.
-  // |forms| - array of forms aggregated in this request.
-  bool StartQueryRequest(const std::vector<FormStructure*>& forms,
-                         const AutofillMetrics& metric_logger);
-
-  // Starts an upload request for the given |form|, unless throttled by the
-  // server. The probability of the request going over the wire is
-  // GetPositiveUploadRate() if |form_was_autofilled| is true, or
-  // GetNegativeUploadRate() otherwise. The observer will be called even if
-  // there was no actual trip over the wire.
-  // |available_field_types| should contain the types for which we have data
-  // stored on the local client.
-  bool StartUploadRequest(const FormStructure& form,
-                          bool form_was_autofilled,
-                          const FieldTypeSet& available_field_types);
-
- private:
-  friend class AutofillDownloadTest;
-  FRIEND_TEST_ALL_PREFIXES(AutofillDownloadTest, QueryAndUploadTest);
-
-  static std::string AutofillRequestTypeToString(const AutofillRequestType);
-
-  struct FormRequestData;
-  typedef std::list<std::pair<std::string, std::string> > QueryRequestCache;
-
-  // Initiates request to Autofill servers to download/upload heuristics.
-  // |form_xml| - form structure XML to upload/download.
-  // |request_data| - form signature hash(es) and indicator if it was a query.
-  // |request_data.query| - if true the data is queried and observer notified
-  //   with new data, if available. If false heuristic data is uploaded to our
-  //   servers.
-  bool StartRequest(const std::string& form_xml,
-                    const FormRequestData& request_data);
-
-  // Each request is page visited. We store last |max_form_cache_size|
-  // request, to avoid going over the wire. Set to 16 in constructor. Warning:
-  // the search is linear (newest first), so do not make the constant very big.
-  void set_max_form_cache_size(size_t max_form_cache_size) {
-    max_form_cache_size_ = max_form_cache_size;
-  }
-
-  // Caches query request. |forms_in_query| is a vector of form signatures in
-  // the query. |query_data| is the successful data returned over the wire.
-  void CacheQueryRequest(const std::vector<std::string>& forms_in_query,
-                         const std::string& query_data);
-  // Returns true if query is in the cache, while filling |query_data|, false
-  // otherwise. |forms_in_query| is a vector of form signatures in the query.
-  bool CheckCacheForQueryRequest(const std::vector<std::string>& forms_in_query,
-                                 std::string* query_data) const;
-  // Concatenates |forms_in_query| into one signature.
-  std::string GetCombinedSignature(
-      const std::vector<std::string>& forms_in_query) const;
-
-  // net::URLFetcherDelegate implementation:
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
-
-  // Probability of the form upload. Between 0 (no upload) and 1 (upload all).
-  // GetPositiveUploadRate() is for matched forms,
-  // GetNegativeUploadRate() for non-matched.
-  double GetPositiveUploadRate() const;
-  double GetNegativeUploadRate() const;
-  void SetPositiveUploadRate(double rate);
-  void SetNegativeUploadRate(double rate);
-
-  // The pointer value is const, so this can only be set in the
-  // constructor.  Must not be null.
-  content::BrowserContext* const browser_context_;  // WEAK
-
-  // The observer to notify when server predictions are successfully received.
-  // The pointer value is const, so this can only be set in the constructor.
-  // Must not be null.
-  AutofillDownloadManager::Observer* const observer_;  // WEAK
-
-  // For each requested form for both query and upload we create a separate
-  // request and save its info. As url fetcher is identified by its address
-  // we use a map between fetchers and info.
-  std::map<net::URLFetcher*, FormRequestData> url_fetchers_;
-
-  // Cached QUERY requests.
-  QueryRequestCache cached_forms_;
-  size_t max_form_cache_size_;
-
-  // Time when next query/upload requests are allowed. If 50x HTTP received,
-  // exponential back off is initiated, so this times will be in the future
-  // for awhile.
-  base::Time next_query_request_;
-  base::Time next_upload_request_;
-
-  // |positive_upload_rate_| is for matched forms,
-  // |negative_upload_rate_| for non matched.
-  double positive_upload_rate_;
-  double negative_upload_rate_;
-
-  // Needed for unit-test.
-  int fetcher_id_for_unittest_;
-};
-
-#endif  // CHROME_BROWSER_AUTOFILL_AUTOFILL_DOWNLOAD_H_