Updates language model on iOS.

ios/web_view/internal/translate/web_view_translate_client.mm

 // 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.
 
 #import "ios/web_view/internal/translate/web_view_translate_client.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #import "base/mac/scoped_nsobject.h"
@@ skipping 16 matching lines @@
 #include "url/gurl.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 DEFINE_WEB_STATE_USER_DATA_KEY(ios_web_view::WebViewTranslateClient);
 
 namespace ios_web_view {
 
+// TODO(ramyasharma): Investigate if language_model needs to be passed here

[rohitrao (ping after 24h), 2017/06/05 13:37:43]

Please file a bug for this and use TODO(crbug.com/NNNNNN).  That will help make
sure we don't forget to follow up.

[michaeldo, 2017/06/05 15:03:43]

Agreed, we always use bug number references in ios/ to ensure we don't lose
track of TODOs.

Please add the "Mobile>iOSWebView" component to the bug you create.

[ramyasharma, 2017/06/06 04:22:27]

Done.

[ramyasharma, 2017/06/06 04:22:27]

Done.

+// so that the language model histogram is updated from webview.
 WebViewTranslateClient::WebViewTranslateClient(web::WebState* web_state)
     : web::WebStateObserver(web_state),
       translate_manager_(base::MakeUnique<translate::TranslateManager>(
           this,
           WebViewTranslateRankerFactory::GetForBrowserState(
               WebViewBrowserState::FromBrowserState(
                   web_state->GetBrowserState())),
           prefs::kAcceptLanguages)),
       translate_driver_(web_state,
                         web_state->GetNavigationManager(),
-                        translate_manager_.get()) {}
+                        translate_manager_.get(),
+                        nil /*language_model*/) {}
 
 WebViewTranslateClient::~WebViewTranslateClient() = default;
 
 // TranslateClient implementation:
 
 std::unique_ptr<infobars::InfoBar> WebViewTranslateClient::CreateInfoBar(
     std::unique_ptr<translate::TranslateInfoBarDelegate> delegate) const {
   NOTREACHED();
   return nullptr;
 }
@@ skipping 60 matching lines @@
 }
 
 void WebViewTranslateClient::WebStateDestroyed() {
   // Translation process can be interrupted.
   // Destroying the TranslateManager now guarantees that it never has to deal
   // with nullptr WebState.
   translate_manager_.reset();
 }
 
 }  // namespace ios_web_view