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

content/browser/frame_host/navigation_request.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_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
 
 #include <memory>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/loader/navigation_url_loader_delegate.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
 #include "content/common/navigation_params.h"
 #include "content/public/browser/navigation_throttle.h"
+#include "content/public/common/previews_state.h"
 
 namespace content {
 
 class FrameNavigationEntry;
 class FrameTreeNode;
 class NavigationControllerImpl;
 class NavigationHandleImpl;
 class NavigationURLLoader;
 class NavigationData;
 class ResourceRequestBody;
@@ skipping 41 matching lines @@
   };
 
   // Creates a request for a browser-intiated navigation.
   static std::unique_ptr<NavigationRequest> CreateBrowserInitiated(
       FrameTreeNode* frame_tree_node,
       const GURL& dest_url,
       const Referrer& dest_referrer,
       const FrameNavigationEntry& frame_entry,
       const NavigationEntryImpl& entry,
       FrameMsg_Navigate_Type::Value navigation_type,
-      LoFiState lofi_state,
+      PreviewsState previews_state,
       bool is_same_document_history_load,
       bool is_history_navigation_in_new_child,
       const base::TimeTicks& navigation_start,
       NavigationControllerImpl* controller);
 
   // Creates a request for a renderer-intiated navigation.
   // Note: |body| is sent to the IO thread when calling BeginNavigation, and
   // should no longer be manipulated afterwards on the UI thread.
   // TODO(clamy): see if ResourceRequestBody could be un-refcounted to avoid
   // threading subtleties.
@@ skipping 162 matching lines @@
   std::unique_ptr<StreamHandle> body_;
 
   base::Closure on_start_checks_complete_closure_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationRequest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_