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

content/renderer/render_frame_impl.h

 // Copyright 2013 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_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 418 matching lines @@
   bool IsFTPDirectoryListing() override;
   void AttachGuest(int element_instance_id) override;
   void DetachGuest(int element_instance_id) override;
   void SetSelectedText(const base::string16& selection_text,
                        size_t offset,
                        const gfx::Range& range) override;
   void EnsureMojoBuiltinsAreAvailable(v8::Isolate* isolate,
                                       v8::Local<v8::Context> context) override;
   void AddMessageToConsole(ConsoleMessageLevel level,
                            const std::string& message) override;
-  bool IsUsingLoFi() const override;
+  int GetPreviewsState() const override;
   bool IsPasting() const override;
   blink::WebPageVisibilityState GetVisibilityState() const override;
   bool IsBrowserSideNavigationPending() override;
 
   // mojom::Frame implementation:
   void GetInterfaceProvider(
       service_manager::mojom::InterfaceProviderRequest request) override;
 
   // mojom::HostZoom implementation:
   void SetHostZoomLevel(const GURL& url, double zoom_level) override;
@@ skipping 822 matching lines @@
   // Only valid if |accessibility_mode_| is anything other than
   // AccessibilityModeOff.
   RenderAccessibilityImpl* render_accessibility_;
 
   std::unique_ptr<blink::WebBluetooth> bluetooth_;
 
   // Manages play, pause notifications for WebMediaPlayer implementations; its
   // lifetime is tied to the RenderFrame via the RenderFrameObserver interface.
   media::RendererWebMediaPlayerDelegate* media_player_delegate_;
 
-  // Whether or not this RenderFrame is using Lo-Fi mode.
-  bool is_using_lofi_;
+  // The PreviewsState of this RenderFrame that indicates which Previews are
+  // being used.
+  int previews_state_;
 
   // Effective connection type when the document of this frame was fetched.
   blink::WebEffectiveConnectionType effective_connection_type_;
 
   // Whether or not this RenderFrame is currently pasting.
   bool is_pasting_;
 
   // Whether we must stop creating nested message loops for modal dialogs. This
   // is necessary because modal dialogs have a ScopedPageLoadDeferrer on the
   // stack that interferes with swapping out.
@@ skipping 48 matching lines @@
   bool browser_side_navigation_pending_ = false;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_