Adds logging to indicate infobar creation in the native library,

chrome/browser/ui/android/infobars/translate_infobar.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/android/infobars/translate_infobar.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/translate/android/translate_utils.h"
 #include "chrome/browser/translate/chrome_translate_client.h"
 #include "chrome/browser/ui/android/infobars/translate_compact_infobar.h"
+#include "components/translate/core/browser/translate_browser_metrics.h"
 #include "components/translate/core/browser/translate_infobar_delegate.h"
 #include "jni/TranslateInfoBar_jni.h"
 
 using base::android::JavaParamRef;
 using base::android::ScopedJavaLocalRef;
 
 // ChromeTranslateClient
 // ----------------------------------------------------------
 
 std::unique_ptr<infobars::InfoBar> ChromeTranslateClient::CreateInfoBar(
     std::unique_ptr<translate::TranslateInfoBarDelegate> delegate) const {
+  // Log metric to track how many times a brand new infobar was created to
+  // prompt the user to translate.
+  if (delegate.get()->translate_step() ==
+      translate::TRANSLATE_STEP_BEFORE_TRANSLATE) {
+    translate::TranslateBrowserMetrics::ReportInitiationStatus(
+        translate::TranslateBrowserMetrics::INITIATION_STATUS_CREATE_INFOBAR);
+  }
+
   if (base::FeatureList::IsEnabled(translate::kTranslateCompactUI))
     return base::MakeUnique<TranslateCompactInfoBar>(std::move(delegate));
-  else
-    return base::MakeUnique<TranslateInfoBar>(std::move(delegate));
+
+  return base::MakeUnique<TranslateInfoBar>(std::move(delegate));
 }
 
-
 // TranslateInfoBar -----------------------------------------------------------
 
 TranslateInfoBar::TranslateInfoBar(
     std::unique_ptr<translate::TranslateInfoBarDelegate> delegate)
     : InfoBarAndroid(std::move(delegate)) {}
 
 TranslateInfoBar::~TranslateInfoBar() {
 }
 
 ScopedJavaLocalRef<jobject> TranslateInfoBar::CreateRenderInfoBar(JNIEnv* env) {
@@ skipping 102 matching lines @@
 translate::TranslateInfoBarDelegate* TranslateInfoBar::GetDelegate() {
   return delegate()->AsTranslateInfoBarDelegate();
 }
 
 
 // Native JNI methods ---------------------------------------------------------
 
 bool RegisterTranslateInfoBarDelegate(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }