Initialize ios/web_view translate with a system-wide URLRequestContext.

ios/web_view/internal/cwv_web_view_configuration.mm

 // Copyright 2017 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/public/cwv_web_view_configuration.h"
 #import "ios/web_view/internal/cwv_web_view_configuration_internal.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_restrictions.h"
 #include "components/translate/core/browser/translate_download_manager.h"
 #include "ios/web/public/app/web_main.h"
+#include "ios/web_view/internal/app/application_context.h"
 #import "ios/web_view/internal/cwv_user_content_controller_internal.h"
 #import "ios/web_view/internal/web_view_browser_state.h"
 #import "ios/web_view/internal/web_view_web_client.h"
 #import "ios/web_view/internal/web_view_web_main_delegate.h"
-#include "ui/base/l10n/l10n_util_mac.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @interface CWVWebViewConfiguration () {
   // The BrowserState for this configuration.
   std::unique_ptr<ios_web_view::WebViewBrowserState> _browserState;
 }
 
@@ skipping 26 matching lines @@
   static std::unique_ptr<ios_web_view::WebViewWebMainDelegate> webMainDelegate;
   static std::unique_ptr<web::WebMain> webMain;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
     webClient = base::MakeUnique<ios_web_view::WebViewWebClient>();
     web::SetWebClient(webClient.get());
 
     webMainDelegate = base::MakeUnique<ios_web_view::WebViewWebMainDelegate>();
     web::WebMainParams params(webMainDelegate.get());
     webMain = base::MakeUnique<web::WebMain>(params);
+
+    // Initialize translate.
+    translate::TranslateDownloadManager* downloadManager =
+        translate::TranslateDownloadManager::GetInstance();
+    downloadManager->set_request_context(
+        ios_web_view::GetApplicationContext()->GetSystemURLRequestContext());
+    downloadManager->set_application_locale(
+        ios_web_view::GetApplicationContext()->GetApplicationLocale());
+    downloadManager->language_list()->SetResourceRequestsAllowed(true);
   });
 }
 
 - (instancetype)initWithBrowserState:
     (std::unique_ptr<ios_web_view::WebViewBrowserState>)browserState {
   self = [super init];
   if (self) {
     _browserState = std::move(browserState);
 
-    // Initialize translate.
-    translate::TranslateDownloadManager* downloadManager =
-        translate::TranslateDownloadManager::GetInstance();
-    // TODO(crbug.com/710948): Use global request context here.
-    downloadManager->set_request_context(_browserState->GetRequestContext());
-    // TODO(crbug.com/679895): Bring up application locale correctly.
-    downloadManager->set_application_locale(l10n_util::GetLocaleOverride());
-    downloadManager->language_list()->SetResourceRequestsAllowed(true);
-
     _userContentController =
         [[CWVUserContentController alloc] initWithConfiguration:self];
   }
   return self;
 }
 
 - (BOOL)isPersistent {
   return !_browserState->IsOffTheRecord();
 }
 
 - (ios_web_view::WebViewBrowserState*)browserState {
   return _browserState.get();
 }
 
 // NSCopying
 
 - (id)copyWithZone:(NSZone*)zone {
   [[self class] initialize];
 
   auto browserState = base::MakeUnique<ios_web_view::WebViewBrowserState>(
       _browserState->IsOffTheRecord());
 
   return [[[self class] allocWithZone:zone]
       initWithBrowserState:std::move(browserState)];
 }
 
 @end