Add ContextualSuggestionsService to Omnibox

components/omnibox/browser/omnibox_field_trial.h

 // Copyright 2014 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 COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_FIELD_TRIAL_H_
 #define COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_FIELD_TRIAL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 408 matching lines @@
 
   // Returns the base relevance score for Physical Web omnibox suggestions when
   // the user has clicked on the omnibox but has not typed anything yet.
   static int GetPhysicalWebZeroSuggestBaseRelevance();
 
   // Returns the base relevance score for Physical Web omnibox suggestions when
   // the user has started typing in the omnibox.
   static int GetPhysicalWebAfterTypingBaseRelevance();
 
   // ---------------------------------------------------------
-  // For experiment redirecting zero suggest requests to a service provided by

[Mark P, 2017/07/18 19:11:30]

It would be nice to keep all the omnibox field trial logic in one place, so we
can easily see what experiments exist and/or need to be retired.  Please use
these functions if possible.

-  // the Chrome team.
-
-  // Returns true whether the user is in the field trial which redirects zero
-  // suggest requests to the service provided by the Chrome team.
-  static bool InZeroSuggestRedirectToChromeFieldTrial();
-
-  // Returns a string representing the address of the server where the zero
-  // suggest requests are being redirected. The return value is a URL
-  // (https://example.com/test) and it doesn't include any query component
-  // (no "?").
-  static std::string ZeroSuggestRedirectToChromeServerAddress();
-
-  // Returns a string representing the parameters that are sent to the
-  // alternative service providing zero suggestions. The returned value is
-  // properly escaped. It can be appended to the string representaiton of a
-  // request URL.
-  static std::string ZeroSuggestRedirectToChromeAdditionalFields();
-
-  // ---------------------------------------------------------
   // Clipboard URL suggestions:
 
   // The parameter "ClipboardURLMaximumAge" doesn't live in this file; instead
   // it lives in
   // components/open_from_clipboard/clipboard_recent_content.cc.
   // Please see ClipboardRecentContent::MaximumAgeOfClipboard() for the usage
   // of it.  The parameter cannot live here because that component cannot
   // include this component, else there would be a circular dependency.
 
   // ---------------------------------------------------------
@@ skipping 48 matching lines @@
 
   // Parameter names used by the experiment that limits the number of history
   // urls indexed for suggestions.
   static const char kMaxNumHQPUrlsIndexedAtStartupOnLowEndDevicesParam[];
   static const char kMaxNumHQPUrlsIndexedAtStartupOnNonLowEndDevicesParam[];
 
   // Parameter names used by the Physical Web experimental scoring experiments.
   static const char kPhysicalWebZeroSuggestBaseRelevanceParam[];
   static const char kPhysicalWebAfterTypingBaseRelevanceParam[];
 
-  // Parameter names used by the experiment redirecting Zero Suggestion requests
-  // to a service provided by the Chrome team.
-  static const char kZeroSuggestRedirectToChromeServerAddressParam[];
-  static const char kZeroSuggestRedirectToChromeAdditionalFieldsParam[];
-
   // Parameter names used by UI experiments.
   static const char kUIMaxAutocompleteMatchesParam[];
   static const char kUIVerticalMarginParam[];
 
   // The amount of time to wait before sending a new suggest request after the
   // previous one unless overridden by a field trial parameter.
   // Non-const because some unittests modify this value.
   static int kDefaultMinimumTimeBetweenSuggestQueriesMs;
 
  private:
@@ skipping 15 matching lines @@
   // prioritize different wildcard contexts, see the implementation.  How to
   // interpret the value is left to the caller; this is rule-dependent.
   static std::string GetValueForRuleInContext(
       const std::string& rule,
       metrics::OmniboxEventProto::PageClassification page_classification);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(OmniboxFieldTrial);
 };
 
 #endif  // COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_FIELD_TRIAL_H_