[Device Service] Decouple NFC implementation from //content

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 2624 matching lines @@
   if (!renderer_wake_lock_) {
     device::mojom::WakeLockContext* wake_lock_context = GetWakeLockContext();
     if (!wake_lock_context) {
       return nullptr;
     }
     wake_lock_context->GetWakeLock(mojo::MakeRequest(&renderer_wake_lock_));
   }
   return renderer_wake_lock_.get();
 }
 
+void WebContentsImpl::GetNFC(device::nfc::mojom::NFCRequest request) {
+  if (!nfc_host_)
+    nfc_host_.reset(new NFCHost(this));
+  nfc_host_->GetNFC(std::move(request));
+}
+
 void WebContentsImpl::OnShowValidationMessage(
     RenderViewHostImpl* source,
     const gfx::Rect& anchor_in_root_view,
     const base::string16& main_text,
     const base::string16& sub_text) {
   // TODO(nick): Should we consider |source| here or pass it to the delegate?
   if (delegate_)
     delegate_->ShowValidationMessage(
         this, anchor_in_root_view, main_text, sub_text);
 }
@@ skipping 1670 matching lines @@
 
   if (!render_frame_host->IsRenderFrameLive() || render_frame_host->GetParent())
     return;
 
   NavigationEntry* entry = controller_.GetPendingEntry();
   if (entry && entry->IsViewSourceMode()) {
     // Put the renderer in view source mode.
     render_frame_host->Send(
         new FrameMsg_EnableViewSourceMode(render_frame_host->GetRoutingID()));
   }
-#if defined(OS_ANDROID)
-  render_frame_host->GetInterfaceRegistry()->AddInterface(
-      GetJavaInterfaces()->CreateInterfaceFactory<device::nfc::mojom::NFC>());
-#endif
 }
 
 void WebContentsImpl::RenderFrameDeleted(RenderFrameHost* render_frame_host) {
   for (auto& observer : observers_)
     observer.RenderFrameDeleted(render_frame_host);
 #if BUILDFLAG(ENABLE_PLUGINS)
   pepper_playback_observer_->RenderFrameDeleted(render_frame_host);
 #endif
 }
 
@@ skipping 1267 matching lines @@
     RenderViewHost* render_view_host = RenderViewHost::From(render_widget_host);
     if (!render_view_host)
       continue;
     render_view_host_set.insert(render_view_host);
   }
   for (RenderViewHost* render_view_host : render_view_host_set)
     render_view_host->OnWebkitPreferencesChanged();
 }
 
 }  // namespace content