Send TranslateEventProtos to UMA.

chrome/browser/translate/chrome_translate_client.h

Index: chrome/browser/translate/chrome_translate_client.h
diff --git a/chrome/browser/translate/chrome_translate_client.h b/chrome/browser/translate/chrome_translate_client.h
index cf027569a97d7195652d9b259ccc2421e00e7ab2..4a481706742278d04a944843b9eb596b91a2151e 100644
--- a/chrome/browser/translate/chrome_translate_client.h
+++ b/chrome/browser/translate/chrome_translate_client.h
@@ -36,6 +36,10 @@ class TranslatePrefs;
 class TranslateManager;
 }  // namespace translate
 
+namespace metrics {
+class TranslateEventProto;
+}  // namespace metrics
+
 class ChromeTranslateClient
     : public translate::TranslateClient,
       public translate::ContentTranslateDriver::Observer,
@@ -83,6 +87,11 @@ class ChromeTranslateClient
   // destroyed.
   content::WebContents* GetWebContents();
 
+  // Record a TranslateEventProto. If the metrics provider is not accessible,
+  // returns false.
+  bool RecordTranslateEvent(

[Roger McFarlane (Chromium), 2016/10/12 18:18:28]

this entry point isn't needed. The TranslateManager has direct access to the
TranslateRanker, so doesn't need to go through the client.

[hamelphi, 2016/10/12 21:06:09]

Done.

+      const metrics::TranslateEventProto& translate_event);
+
   // TranslateClient implementation.
   translate::TranslateDriver* GetTranslateDriver() override;
   PrefService* GetPrefs() override;