Consume Mojo services directly in Blink's WebUSB implementation.

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 600 matching lines @@
   bool enterFullscreen() override;
   bool 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;
-  blink::WebUSBClient* usbClient() override;
   void checkIfAudioSinkExistsAndIsAuthorized(
       const blink::WebString& sink_id,
       const blink::WebSecurityOrigin& security_origin,
       blink::WebSetSinkIdCallbacks* web_callbacks) override;
   blink::ServiceRegistry* serviceRegistry() override;
 
 #if defined(ENABLE_WEBVR)
   blink::WebVRClient* webVRClient() override;
 #endif
 
@@ skipping 560 matching lines @@
   // Only valid if |accessibility_mode_| is anything other than
   // AccessibilityModeOff.
   RendererAccessibility* renderer_accessibility_;
 
   std::unique_ptr<PermissionDispatcher> permission_client_;
 
   std::unique_ptr<blink::WebAppBannerClient> app_banner_client_;
 
   std::unique_ptr<blink::WebBluetooth> bluetooth_;
 
-  std::unique_ptr<blink::WebUSBClient> usb_client_;
-
   // 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_;
 
   // Whether or not this RenderFrame is currently pasting.
   bool is_pasting_;
 
@@ skipping 15 matching lines @@
   FrameBlameContext* blame_context_;  // Not owned.
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_