Create a Lite Page bit for previews and fallback to Lo-Fi

components/data_reduction_proxy/core/browser/data_reduction_proxy_config.h

 // Copyright 2015 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_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_CONFIG_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_CONFIG_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 173 matching lines @@
   // Returns true if the Data Reduction Proxy promo may be shown. This is not
   // tied to whether the Data Reduction Proxy is enabled.
   bool promo_allowed() const;
 
   // Sets |lofi_off_| to true.
   void SetLoFiModeOff();
 
   // Returns |lofi_off_|.
   bool lofi_off() const { return lofi_off_; }
 
-  // Returns true when Lo-Fi mode should be activated. Records metrics for Lo-Fi
-  // state changes. |request| is used to get the network quality estimator from
-  // the URLRequestContext.
-  bool ShouldEnableLoFiMode(const net::URLRequest& request);
+  // Returns true when Lo-Fi Previews should be activated. Records metrics for
+  // Lo-Fi state changes. |request| is used to get the network quality estimator
+  // from the URLRequestContext.
+  bool ShouldEnableLoFi(const net::URLRequest& request);
+
+  // Returns true when Lite Page Previews should be activated. |request| is used
+  // to get the network quality estimator from the URLRequestContext.
+  bool ShouldEnableLitePages(const net::URLRequest& request);
 
   // Returns true if the data saver has been enabled by the user, and the data
   // saver proxy is reachable.
   bool enabled_by_user_and_reachable() const;
 
   // Gets the ProxyConfig that would be used ignoring the holdback experiment.
   // This should only be used for logging purposes.
   net::ProxyConfig ProxyConfigIgnoringHoldback() const;
 
   bool secure_proxy_allowed() const;
@@ skipping 76 matching lines @@
   // proxies are bypassed, returns the minimum retry delay of the bypassed data
   // reduction proxies in min_retry_delay (if not NULL). If there are no
   // bypassed data reduction proxies for the request scheme, returns false and
   // does not assign min_retry_delay.
   bool AreProxiesBypassed(
       const net::ProxyRetryInfoMap& retry_map,
       const net::ProxyConfig::ProxyRules& proxy_rules,
       bool is_https,
       base::TimeDelta* min_retry_delay) const;
 
-  // Returns true when Lo-Fi mode should be activated. Determines if Lo-Fi mode
-  // should be activated by checking the Lo-Fi flags and if the network quality
-  // is prohibitively slow. |network_quality_estimator| may be NULL.
-  bool ShouldEnableLoFiModeInternal(
+  // Returns true when Lo-Fi Previews should be activated. Determines if Lo-Fi
+  // Previews should be activated by checking the Lo-Fi flags and if the network
+  // quality is prohibitively slow. |network_quality_estimator| may be NULL.
+  bool ShouldEnableLoFiInternal(
+      const net::NetworkQualityEstimator* network_quality_estimator);
+
+  // Returns true when Lite Page Previews should be activated. Determines if
+  // Lite Page Previewsmode should be activated by checking the Lite Page
+  // Previews flags and if the network quality is prohibitively slow.
+  // |network_quality_estimator| may be NULL.
+  bool ShouldEnableLitePagesInternal(
       const net::NetworkQualityEstimator* network_quality_estimator);
 
   // Returns true if the network quality is at least as poor as the one
   // specified in the Auto Lo-Fi field trial parameters.
   // |network_quality_estimator| may be NULL. Virtualized for unit testing.
   virtual bool IsNetworkQualityProhibitivelySlow(
       const net::NetworkQualityEstimator* network_quality_estimator);
 
   // Records Lo-Fi accuracy metric. |measuring_duration| should belong to the
   // vector returned by LofiAccuracyRecordingIntervals().
@@ skipping 107 matching lines @@
   bool is_captive_portal_;
 
   base::WeakPtrFactory<DataReductionProxyConfig> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyConfig);
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_CONFIG_H_