Integrate RankerModelLoader with TranslateRanker.

chrome/browser/translate/chrome_translate_client.cc

Index: chrome/browser/translate/chrome_translate_client.cc
diff --git a/chrome/browser/translate/chrome_translate_client.cc b/chrome/browser/translate/chrome_translate_client.cc
index 53110c1049952b43f127482fbe670c56ce55931f..1ce6b9d25f7b215f340e3524a75a61bfe1af14a0 100644
--- a/chrome/browser/translate/chrome_translate_client.cc
+++ b/chrome/browser/translate/chrome_translate_client.cc
@@ -16,6 +16,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/translate/language_model_factory.h"
 #include "chrome/browser/translate/translate_accept_languages_factory.h"
+#include "chrome/browser/translate/translate_ranker_factory.h"
 #include "chrome/browser/translate/translate_service.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
@@ -71,11 +72,13 @@ DEFINE_WEB_CONTENTS_USER_DATA_KEY(ChromeTranslateClient);
 ChromeTranslateClient::ChromeTranslateClient(content::WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       translate_driver_(&web_contents->GetController()),
-      translate_manager_(
-          new translate::TranslateManager(this, prefs::kAcceptLanguages)),
-      language_model_(
-          LanguageModelFactory::GetInstance()->GetForBrowserContext(
-              web_contents->GetBrowserContext())) {
+      translate_manager_(new translate::TranslateManager(
+          this,
+          translate::TranslateRankerFactory::GetInstance()

[droger, 2017/04/03 09:18:08]

You can use TranslateRankerFactory::GetForBrowserContext directly.
No need for GetInstance().

[Roger McFarlane (Chromium), 2017/04/03 17:44:54]

Done.

+              ->GetForBrowserContext(web_contents->GetBrowserContext()),
+          prefs::kAcceptLanguages)),
+      language_model_(LanguageModelFactory::GetInstance()->GetForBrowserContext(
+          web_contents->GetBrowserContext())) {
   translate_driver_.AddObserver(this);
   translate_driver_.set_translate_manager(translate_manager_.get());
 }