[Herb] Add metrics to track button usage

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
index 0c00788997a518239244fc8f632828e5c67a17ec..42291cffe0e213172c35979075bc8e89558eaef8 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
@@ -237,6 +237,7 @@ public class CustomTabActivity extends ChromeActivity {
                         if (mIntentDataProvider.isOpenedByBrowser()) {
                             createHerbResultIntent(RESULT_CLOSED);
                         }
+                        RecordUserAction.record("CustomTabs.CloseButtonClicked");
                         CustomTabActivity.this.finish();
                     }
                 });
@@ -449,6 +450,7 @@ public class CustomTabActivity extends ChromeActivity {
                 if (mIntentDataProvider.isOpenedByBrowser()) {
                     createHerbResultIntent(RESULT_BACK_PRESSED);
                 }
+                RecordUserAction.record("CustomTabs.SystemBackFinishedApp");
                 finish();
             }
         }
@@ -471,6 +473,7 @@ public class CustomTabActivity extends ChromeActivity {
                                 ApiCompatibilityUtils.getCreatorPackage(params.getPendingIntent());
                         if (mIntentDataProvider.finishAfterOpeningInBrowser()
                                 && TextUtils.equals(getPackageName(), creatorPackage)) {
+                            RecordUserAction.record("Herb.OpenInChromeActionButtonClicked");
                             openCurrentUrlInBrowser();
                             finish();
                         } else {