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

content/child/weburlresponse_extradata_impl.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_CHILD_WEBURLRESPONSE_EXTRADATA_IMPL_H_
 #define CONTENT_CHILD_WEBURLRESPONSE_EXTRADATA_IMPL_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "content/common/content_export.h"
+#include "content/public/common/previews_state.h"
 #include "net/http/http_response_info.h"
 #include "net/nqe/effective_connection_type.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
 
 namespace content {
 
 class CONTENT_EXPORT WebURLResponseExtraDataImpl :
     public NON_EXPORTED_BASE(blink::WebURLResponse::ExtraData) {
  public:
   explicit WebURLResponseExtraDataImpl(
@@ skipping 38 matching lines @@
   void set_was_alternate_protocol_available(
       bool was_alternate_protocol_available) {
     was_alternate_protocol_available_ = was_alternate_protocol_available;
   }
 
   bool is_ftp_directory_listing() const { return is_ftp_directory_listing_; }
   void set_is_ftp_directory_listing(bool is_ftp_directory_listing) {
     is_ftp_directory_listing_ = is_ftp_directory_listing;
   }
 
-  bool is_using_lofi() const { return is_using_lofi_; }
-  void set_is_using_lofi(bool is_using_lofi) { is_using_lofi_ = is_using_lofi; }
+  // Returns a bitmask of potentially several Previews optimizations.
+  PreviewsState previews_state() const { return previews_state_; }
+  void set_previews_state(PreviewsState previews_state) {
+    previews_state_ = previews_state;
+  }
 
   net::EffectiveConnectionType effective_connection_type() const {
     return effective_connection_type_;
   }
   void set_effective_connection_type(
       net::EffectiveConnectionType effective_connection_type) {
     effective_connection_type_ = effective_connection_type;
   }
 
  private:
   std::string alpn_negotiated_protocol_;
   bool is_ftp_directory_listing_;
   bool was_fetched_via_spdy_;
   bool was_alpn_negotiated_;
   net::HttpResponseInfo::ConnectionInfo connection_info_;
   bool was_alternate_protocol_available_;
-  bool is_using_lofi_;
+  PreviewsState previews_state_;
   net::EffectiveConnectionType effective_connection_type_;
 
   DISALLOW_COPY_AND_ASSIGN(WebURLResponseExtraDataImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBURLRESPONSE_EXTRADATA_IMPL_H_