[Translate] Integrate TranslateEventProto UMA logging into TranslateManager.

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 06ce2bbbcd236307ca099d12faf0e7064c05534a..85751ce025f517f9e85bab67fc0b4564e7e09a9f 100644
--- a/chrome/browser/translate/chrome_translate_client.cc
+++ b/chrome/browser/translate/chrome_translate_client.cc
@@ -26,6 +26,7 @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/grit/theme_resources.h"
+#include "components/metrics/proto/translate_event.pb.h"
 #include "components/prefs/pref_service.h"
 #include "components/translate/core/browser/language_model.h"
 #include "components/translate/core/browser/language_state.h"
@@ -198,12 +199,21 @@ void ChromeTranslateClient::ShowTranslateUI(
     // another page.
     if (!base::FeatureList::IsEnabled(translate::kTranslateUI2016Q2) &&
         !GetLanguageState().HasLanguageChanged()) {
+      if (translate_manager_) {
+        translate_manager_->RecordTranslateEvent(
+            metrics::TranslateEventProto::MATCHES_PREVIOUS_LANGUAGE);
+      }
       return;
     }
 
     if (!triggered_from_menu &&
-        GetTranslatePrefs()->IsTooOftenDenied(source_language))
+        GetTranslatePrefs()->IsTooOftenDenied(source_language)) {
+      if (translate_manager_) {
+        translate_manager_->RecordTranslateEvent(
+            metrics::TranslateEventProto::LANGUAGE_DISABLED_BY_AUTO_BLACKLIST);
+      }
       return;
+    }
   }
   ShowBubble(step, error_type);
 }
@@ -319,16 +329,28 @@ void ChromeTranslateClient::ShowBubble(
     return;
   }
 
-  if (web_contents() != browser->tab_strip_model()->GetActiveWebContents())
+  if (web_contents() != browser->tab_strip_model()->GetActiveWebContents()) {
+    if (translate_manager_ &&
+        step == translate::TRANSLATE_STEP_BEFORE_TRANSLATE) {
+      translate_manager_->RecordTranslateEvent(
+          metrics::TranslateEventProto::WEBCONTENTS_NOT_ACTIVE);
+    }
     return;
+  }
 
-  // This ShowBubble function is also used for upating the existing bubble.
+  // This ShowBubble function is also used for updating the existing bubble.
   // However, with the bubble shown, any browser windows are NOT activated
   // because the bubble takes the focus from the other widgets including the
   // browser windows. So it is checked that |browser| is the last activated
   // browser, not is now activated.
-  if (browser != chrome::FindLastActive())
+  if (browser != chrome::FindLastActive()) {
+    if (translate_manager_ &&
+        step == translate::TRANSLATE_STEP_BEFORE_TRANSLATE) {
+      translate_manager_->RecordTranslateEvent(
+          metrics::TranslateEventProto::BROSWER_WINDOW_NOT_ACTIVE);
+    }
     return;
+  }
 
   // During auto-translating, the bubble should not be shown.
   if (step == translate::TRANSLATE_STEP_TRANSLATING ||