Change Lo-Fi bool to bitmask to support multiple Previews types

content/common/navigation_params.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 CONTENT_COMMON_NAVIGATION_PARAMS_H_
 #define CONTENT_COMMON_NAVIGATION_PARAMS_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
 #include "content/common/navigation_gesture.h"
 #include "content/common/resource_request_body_impl.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
 #include "content/public/common/request_context_type.h"
 #include "content/public/common/resource_response.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 namespace content {
 
-// The LoFi state which determines whether to add the Lo-Fi header.
-enum LoFiState {
-  // Let the browser process decide whether or not to request the Lo-Fi version.
-  LOFI_UNSPECIFIED = 0,
-
-  // Request a normal (non-Lo-Fi) version of the resource.
-  LOFI_OFF,
-
-  // Request a Lo-Fi version of the resource.
-  LOFI_ON,
-};
-
 // PlzNavigate
 // Helper function to determine if the navigation to |url| should make a request
 // to the network stack. A request should not be sent for JavaScript URLs or
 // about:blank. In these cases, no request needs to be sent.
 bool CONTENT_EXPORT ShouldMakeNetworkRequestForURL(const GURL& url);
 
 // The following structures hold parameters used during a navigation. In
 // particular they are used by FrameMsg_Navigate, FrameMsg_CommitNavigation and
 // FrameHostMsg_BeginNavigation.
 
 // Provided by the browser or the renderer -------------------------------------
 
 // Used by all navigation IPCs.
 struct CONTENT_EXPORT CommonNavigationParams {
   CommonNavigationParams();
   CommonNavigationParams(
       const GURL& url,
       const Referrer& referrer,
       ui::PageTransition transition,
       FrameMsg_Navigate_Type::Value navigation_type,
       NavigationGesture gesture,
       bool allow_download,
       bool should_replace_current_entry,
       base::TimeTicks ui_timestamp,
       FrameMsg_UILoadMetricsReportType::Value report_type,
       const GURL& base_url_for_data_url,
       const GURL& history_url_for_data_url,
-      LoFiState lofi_state,
+      int previews_state,
       const base::TimeTicks& navigation_start,
       std::string method,
       const scoped_refptr<ResourceRequestBodyImpl>& post_data);
   CommonNavigationParams(const CommonNavigationParams& other);
   ~CommonNavigationParams();
 
   // The URL to navigate to.
   // PlzNavigate: May be modified when the navigation is ready to commit.
   GURL url;
 
@@ skipping 30 matching lines @@
   FrameMsg_UILoadMetricsReportType::Value report_type;
 
   // Base URL for use in Blink's SubstituteData.
   // Is only used with data: URLs.
   GURL base_url_for_data_url;
 
   // History URL for use in Blink's SubstituteData.
   // Is only used with data: URLs.
   GURL history_url_for_data_url;
 
-  // Whether or not to request a LoFi version of the document or let the browser
-  // decide.
-  LoFiState lofi_state;
+  // Bitmask that has whether or not to request a Preview version of the
+  // document for various preview types or let the browser decide.
+  int previews_state;
 
   // The navigationStart time exposed through the Navigation Timing API to JS.
   // If this is for a browser-initiated navigation, this can override the
   // navigation_start value in Blink.
   // PlzNavigate: For renderer initiated navigations, this will be set on the
   // renderer side and sent with FrameHostMsg_BeginNavigation.
   base::TimeTicks navigation_start;
 
   // The request method: GET, POST, etc.
   std::string method;
@@ skipping 215 matching lines @@
   ~NavigationParams();
 
   CommonNavigationParams common_params;
   StartNavigationParams start_params;
   RequestNavigationParams request_params;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_NAVIGATION_PARAMS_H_