[translate] Add translate ranker model loader.

ios/chrome/browser/translate/translate_ranker_metrics_provider.h

Index: ios/chrome/browser/translate/translate_ranker_metrics_provider.h
diff --git a/components/translate/core/browser/translate_ranker_metrics_provider.h b/ios/chrome/browser/translate/translate_ranker_metrics_provider.h
similarity index 63%
rename from components/translate/core/browser/translate_ranker_metrics_provider.h
rename to ios/chrome/browser/translate/translate_ranker_metrics_provider.h
index 0ff6470ea3eb7f98758f88a62d9cf31b9a60324b..f4c670337532347ad40fd56821a733147e0d61c0 100644
--- a/components/translate/core/browser/translate_ranker_metrics_provider.h
+++ b/ios/chrome/browser/translate/translate_ranker_metrics_provider.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_TRANSLATE_CORE_BROWSER_BROWSER_TRANSLATE_RANKER_METRICS_PROVIDER_H_
-#define COMPONENTS_TRANSLATE_CORE_BROWSER_BROWSER_TRANSLATE_RANKER_METRICS_PROVIDER_H_
+#ifndef IOS_CHROME_BROWSER_TRANSLATE_TRANSLATE_RANKER_METRICS_PROVIDER_H_
+#define IOS_CHROME_BROWSER_TRANSLATE_TRANSLATE_RANKER_METRICS_PROVIDER_H_
 
 #include "components/metrics/metrics_provider.h"
 
@@ -12,8 +12,8 @@ namespace translate {
 // Provides metrics related to the translate ranker.
 class TranslateRankerMetricsProvider : public metrics::MetricsProvider {
  public:
-  TranslateRankerMetricsProvider();
-  ~TranslateRankerMetricsProvider() override;
+  TranslateRankerMetricsProvider() {}
+  ~TranslateRankerMetricsProvider() override {}
 
  private:
   // From metrics::MetricsProvider...
@@ -25,4 +25,4 @@ class TranslateRankerMetricsProvider : public metrics::MetricsProvider {
 
 }  // namespace translate
 
-#endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_BROWSER_TRANSLATE_RANKER_METRICS_PROVIDER_H_
+#endif  // IOS_CHROME_BROWSER_TRANSLATE_TRANSLATE_RANKER_METRICS_PROVIDER_H_