Send UMA recording state to TranslateRanker.

ios/chrome/browser/translate/translate_ranker_metrics_provider.cc

 // 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.
 
 #include "ios/chrome/browser/translate/translate_ranker_metrics_provider.h"
 
 #include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
 #include "components/metrics/proto/translate_event.pb.h"
 #include "components/translate/core/browser/translate_ranker.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state_manager.h"
 #include "ios/chrome/browser/translate/translate_ranker_factory.h"
 #include "ios/web/public/browser_state.h"
 
 namespace translate {
 
 void TranslateRankerMetricsProvider::ProvideGeneralMetrics(
     metrics::ChromeUserMetricsExtension* uma_proto) {
   std::vector<ios::ChromeBrowserState*> browser_states =
       GetApplicationContext()
           ->GetChromeBrowserStateManager()
           ->GetLoadedBrowserStates();
   for (auto* state : browser_states) {
-    TranslateRanker* ranker =
-        TranslateRankerFactory::GetInstance()->GetForBrowserState(state);
+    TranslateRanker* ranker = TranslateRankerFactory::GetForBrowserState(state);
     DCHECK(ranker);
+    UpdateLoggingState();
     std::vector<metrics::TranslateEventProto> translate_events;
     ranker->FlushTranslateEvents(&translate_events);
 
     for (auto& event : translate_events) {
       uma_proto->add_translate_event()->Swap(&event);
     }
   }
 }
 
+void TranslateRankerMetricsProvider::UpdateLoggingState() {
+  std::vector<ios::ChromeBrowserState*> browser_states =
+      GetApplicationContext()
+          ->GetChromeBrowserStateManager()
+          ->GetLoadedBrowserStates();
+  for (auto* state : browser_states) {
+    TranslateRanker* ranker = TranslateRankerFactory::GetForBrowserState(state);
+    DCHECK(ranker);
+    ranker->EnableLogging(logging_enabled_);
+  }
+}
+
+void TranslateRankerMetricsProvider::OnRecordingEnabled() {
+  logging_enabled_ = true;
+  UpdateLoggingState();
+}
+
+void TranslateRankerMetricsProvider::OnRecordingDisabled() {
+  logging_enabled_ = false;
+  UpdateLoggingState();
+}
+
 }  // namespace translate