[Passwords] Add PasswordManager.AccessPasswordInSettings

This adds histograms to count how passwords are shown in settings.
Having PasswordManager.AccessPasswordInSettings on Android
in addition to the current histograms is beneficial.

Bug: 885245
Change-Id: Ia231316ac476135c6eb4dcecc3f070f7a0e585c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1966961Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Jaeyong Bae <jdragon.bae@gmail.com>
Cr-Commit-Position: refs/heads/master@{#726251}

chrome/android/java/src/org/chromium/chrome/browser/settings/password/PasswordEntryViewer.java

@@ -79,6 +79,11 @@ public class PasswordEntryViewer
     private static final int PASSWORD_ACTION_HIDDEN = 2;
     private static final int PASSWORD_ACTION_BOUNDARY = 3;
 
+    // Metrics: "PasswordManager.AccessPasswordInSettings"
+    private static final int ACCESS_PASSWORD_VIEWED = 0;
+    private static final int ACCESS_PASSWORD_COPIED = 1;
+    private static final int ACCESS_PASSWORD_COUNT = 2;
+
     // ID of this name/password or exception.
     private int mID;
 
@@ -355,6 +360,9 @@ public class PasswordEntryViewer
         RecordHistogram.recordEnumeratedHistogram(
                 "PasswordManager.Android.PasswordCredentialEntry.Password",
                 PASSWORD_ACTION_DISPLAYED, PASSWORD_ACTION_BOUNDARY);
+
+        RecordHistogram.recordEnumeratedHistogram("PasswordManager.AccessPasswordInSettings",
+                ACCESS_PASSWORD_VIEWED, ACCESS_PASSWORD_COUNT);
     }
 
     private void hidePassword() {
@@ -380,6 +388,9 @@ public class PasswordEntryViewer
         RecordHistogram.recordEnumeratedHistogram(
                 "PasswordManager.Android.PasswordCredentialEntry.Password", PASSWORD_ACTION_COPIED,
                 PASSWORD_ACTION_BOUNDARY);
+
+        RecordHistogram.recordEnumeratedHistogram("PasswordManager.AccessPasswordInSettings",
+                ACCESS_PASSWORD_COPIED, ACCESS_PASSWORD_COUNT);
     }
 
     private void hookupPasswordButtons() {