Clean up around methods to enter/exit fullscreen

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 605 matching lines @@
   void postAccessibilityEvent(const blink::WebAXObject& obj,
                               blink::WebAXEvent event) override;
   void handleAccessibilityFindInPageResult(
       int identifier,
       int match_index,
       const blink::WebAXObject& start_object,
       int start_offset,
       const blink::WebAXObject& end_object,
       int end_offset) override;
   void didChangeManifest() override;
-  bool enterFullscreen() override;
-  bool exitFullscreen() override;
+  void enterFullscreen() override;
+  void exitFullscreen() override;
   blink::WebPermissionClient* permissionClient() override;
   blink::WebAppBannerClient* appBannerClient() override;
   void registerProtocolHandler(const blink::WebString& scheme,
                                const blink::WebURL& url,
                                const blink::WebString& title) override;
   void unregisterProtocolHandler(const blink::WebString& scheme,
                                  const blink::WebURL& url) override;
   blink::WebBluetooth* bluetooth() override;
   void checkIfAudioSinkExistsAndIsAuthorized(
       const blink::WebString& sink_id,
@@ skipping 663 matching lines @@
   mojom::FrameHostPtr frame_host_;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_