Send UMA recording state to TranslateRanker.

ios/chrome/browser/translate/translate_ranker_metrics_provider.cc

Index: ios/chrome/browser/translate/translate_ranker_metrics_provider.cc
diff --git a/ios/chrome/browser/translate/translate_ranker_metrics_provider.cc b/ios/chrome/browser/translate/translate_ranker_metrics_provider.cc
index f8039ec6b73861f55188d4d258b7607d2a49e981..ca97bb5e068c52b8ab823af3a1b7b42cd806d327 100644
--- a/ios/chrome/browser/translate/translate_ranker_metrics_provider.cc
+++ b/ios/chrome/browser/translate/translate_ranker_metrics_provider.cc
@@ -34,4 +34,25 @@ void TranslateRankerMetricsProvider::ProvideGeneralMetrics(
   }
 }
 
+void TranslateRankerMetricsProvider::SetLoggingState(bool logging_enabled) {
+  std::vector<ios::ChromeBrowserState*> browser_states =
+      GetApplicationContext()
+          ->GetChromeBrowserStateManager()
+          ->GetLoadedBrowserStates();
+  for (auto* state : browser_states) {
+    TranslateRanker* ranker =
+        TranslateRankerFactory::GetInstance()->GetForBrowserState(state);

[Roger McFarlane (Chromium), 2017/06/06 19:28:27]

TranslateRankerFactory::GetForBrowserState(...)

[hamelphi, 2017/06/06 20:28:06]

Done.

+    DCHECK(ranker);
+    ranker->EnableLogging(logging_enabled);
+  }
+}
+
+void TranslateRankerMetricsProvider::OnRecordingEnabled() {
+  SetLoggingState(true);
+}
+
+void TranslateRankerMetricsProvider::OnRecordingDisabled() {
+  SetLoggingState(false);
+}
+
 }  // namespace translate