Adds logging metrics to translate infobar.

chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java b/chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java
index c9263dcc6f31c63d15b4069654fc4e4834c588a7..9d5a2d6e8487e8176110672a8fd2e7cf16ad9cf5 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java
@@ -37,6 +37,10 @@ class TranslateCompactInfoBar extends InfoBar
     private long mNativeTranslateInfoBarPtr;
     private TranslateTabLayout mTabLayout;
 
+    // Metric to track the total number of translations in a page, including reverts to original.
+    private int mTotalTranslationCount = 0;

[mdjones, 2017/05/15 16:00:30]

Is this only supposed to count the number of translations while the infobar is
open? It seems like this would only ever be 0 or 1.

[ramyasharma, 2017/05/16 05:40:09]

Yes, it counts the number of times the page was translated. We can translate to
multiple languages in the new UI, and go back and forth between original and
translated language many times. Hence this can be any number and not just 0 or
1.
This will give us a sense of how often people try out several translates on a
page, or flip back and forth. 

+
+    // Histogram names for logging metrics.
     private static final String INFOBAR_HISTOGRAM_TRANSLATE_LANGUAGE =
             "Translate.CompactInfobar.Language.Translate";
     private static final String INFOBAR_HISTOGRAM_MORE_LANGUAGES_LANGUAGE =
@@ -48,6 +52,8 @@ class TranslateCompactInfoBar extends InfoBar
     private static final String INFOBAR_HISTOGRAM_NEVER_TRANSLATE_LANGUAGE =
             "Translate.CompactInfobar.Language.NeverTranslate";
     private static final String INFOBAR_HISTOGRAM = "Translate.CompactInfobar.Event";
+    private static final String INFOBAR_HISTOGRAM_TRANSLATION_COUNT =
+            "Translate.CompactInfobar.Count";
 
     /**
      * This is used to back a UMA histogram, so it should be treated as
@@ -73,7 +79,9 @@ class TranslateCompactInfoBar extends InfoBar
     private static final int INFOBAR_SNACKBAR_CANCEL_ALWAYS = 16;
     private static final int INFOBAR_SNACKBAR_CANCEL_NEVER_SITE = 17;
     private static final int INFOBAR_SNACKBAR_CANCEL_NEVER = 18;
-    private static final int INFOBAR_HISTOGRAM_BOUNDARY = 19;
+    private static final int INFOBAR_ALWAYS_TRANSLATE_UNDO = 19;
+    private static final int INFOBAR_CLOSE = 20;
+    private static final int INFOBAR_HISTOGRAM_BOUNDARY = 21;
 
     // Need 2 instances of TranslateMenuHelper to prevent a race condition bug which happens when
     // showing language menu after dismissing overflow menu.
@@ -202,6 +210,7 @@ class TranslateCompactInfoBar extends InfoBar
 
     @CalledByNative
     private void onPageTranslated(int errorType) {
+        mTotalTranslationCount++;
         if (mTabLayout != null) {
             mTabLayout.hideProgressBar();
             if (errorType != 0) {
@@ -237,8 +246,12 @@ class TranslateCompactInfoBar extends InfoBar
     @Override
     public void onCloseButtonClicked() {
         if (!mUserInteracted) {
+            recordInfobarAction(INFOBAR_DECLINE);
             onButtonClicked(ActionType.CANCEL);
         }
+        recordInfobarAction(INFOBAR_CLOSE);
+        RecordHistogram.recordCountHistogram(
+                INFOBAR_HISTOGRAM_TRANSLATION_COUNT, mTotalTranslationCount);
         super.onCloseButtonClicked();
     }
 
@@ -276,16 +289,17 @@ class TranslateCompactInfoBar extends InfoBar
                 mLanguageMenuHelper.show(TranslateMenu.MENU_TARGET_LANGUAGE);
                 return;
             case TranslateMenu.ID_OVERFLOW_ALWAYS_TRANSLATE:
-                recordInfobarAction(INFOBAR_ALWAYS_TRANSLATE);
-                recordInfobarLanguageData(
-                        INFOBAR_HISTOGRAM_ALWAYS_TRANSLATE_LANGUAGE, mOptions.sourceLanguageCode());
                 // Only show snackbar when "Always Translate" is enabled.
                 if (!mOptions.alwaysTranslateLanguageState()) {
+                    recordInfobarAction(INFOBAR_ALWAYS_TRANSLATE);
+                    recordInfobarLanguageData(INFOBAR_HISTOGRAM_ALWAYS_TRANSLATE_LANGUAGE,
+                            mOptions.sourceLanguageCode());
                     createAndShowSnackbar(
                             getContext().getString(R.string.translate_snackbar_always_translate,
                                     mOptions.sourceLanguageName(), mOptions.targetLanguageName()),
                             Snackbar.UMA_TRANSLATE_ALWAYS, itemId);
                 } else {
+                    recordInfobarAction(INFOBAR_ALWAYS_TRANSLATE_UNDO);
                     handleTranslateOptionPostSnackbar(itemId);
                 }
                 return;