Add WebAPK installation metrics.

chrome/browser/android/banners/app_banner_infobar_delegate_android.cc

Index: chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
diff --git a/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc b/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
index 9736a200bc5e7588687f4323c8a9658c57bc02a9..460798eaee81ace7b16bcb4d146d22b2506d3bc6 100644
--- a/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
+++ b/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
@@ -15,6 +15,7 @@
 #include "chrome/browser/android/shortcut_info.h"
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/android/webapk/webapk_installer.h"
+#include "chrome/browser/android/webapk/webapk_metrics.h"
 #include "chrome/browser/banners/app_banner_manager.h"
 #include "chrome/browser/banners/app_banner_metrics.h"
 #include "chrome/browser/banners/app_banner_settings_helper.h"
@@ -43,6 +44,15 @@ bool IsInfoEmpty(const ShortcutInfo* info) {
   return !info || info->url.is_empty();
 }
 
+void TrackWebApkDismissEvents(banners::InstallState install_state) {
+  if (install_state == banners::WAIT_FOR_START)
+    webapk::TrackDismissEvent(webapk::DISMISS_EVENT_ADD_TO_HOMESCREEN);
+  else if (install_state == banners::INSTALLING)
+    webapk::TrackDismissEvent(webapk::DISMISS_EVENT_ADDING);
+  else if (install_state == banners::INSTALLED)
+    webapk::TrackDismissEvent(webapk::DISMISS_EVENT_OPEN);
+}
+
 }  // anonymous namespace
 
 namespace banners {
@@ -65,6 +75,7 @@ AppBannerInfoBarDelegateAndroid::AppBannerInfoBarDelegateAndroid(
       event_request_id_(event_request_id),
       has_user_interaction_(false),
       is_webapk_(is_webapk),
+      install_state_(WAIT_FOR_START),
       weak_ptr_factory_(this) {
   DCHECK(!IsInfoEmpty(shortcut_info_.get()));
   CreateJavaDelegate();
@@ -93,10 +104,13 @@ AppBannerInfoBarDelegateAndroid::~AppBannerInfoBarDelegateAndroid() {
   weak_ptr_factory_.InvalidateWeakPtrs();
 
   if (!has_user_interaction_) {
-    if (!native_app_data_.is_null())
+    if (!native_app_data_.is_null()) {
       TrackUserResponse(USER_RESPONSE_NATIVE_APP_IGNORED);
-    else if (!IsInfoEmpty(shortcut_info_.get()))
+    } else if (!IsInfoEmpty(shortcut_info_.get())) {
       TrackUserResponse(USER_RESPONSE_WEB_APP_IGNORED);
+      if (is_webapk_)
+        webapk::TrackUserAction(webapk::USER_ACTION_BANNER_IGNORED);
+    }
   }
 
   TrackDismissEvent(DISMISS_EVENT_DISMISSED);
@@ -169,6 +183,9 @@ void AppBannerInfoBarDelegateAndroid::InstallWebApk(
                << "the associated WebContents is null.";
     return;
   }
+  install_state_ = INSTALLING;
+  webapk::TrackInstallEvent(webapk::INSTALL_EVENT_ADD_FROM_MENU_STARTED);
+  webapk::TrackUserAction(webapk::USER_ACTION_ADD_FROM_MENU);
   AcceptWebApk(web_contents);
 }
 
@@ -216,6 +233,8 @@ void AppBannerInfoBarDelegateAndroid::InfoBarDismissed() {
     AppBannerSettingsHelper::RecordBannerDismissEvent(
         web_contents, native_app_package_, AppBannerSettingsHelper::NATIVE);
   } else if (!IsInfoEmpty(shortcut_info_.get())) {
+    if (is_webapk_)
+      TrackWebApkDismissEvents(install_state_);
     TrackUserResponse(USER_RESPONSE_WEB_APP_DISMISSED);
     AppBannerSettingsHelper::RecordBannerDismissEvent(
         web_contents, shortcut_info_->url.spec(),
@@ -244,6 +263,8 @@ bool AppBannerInfoBarDelegateAndroid::Accept() {
   if (!native_app_data_.is_null()) {
     return AcceptNativeApp(web_contents);
   } else if (is_webapk_) {
+    webapk::TrackInstallEvent(webapk::INSTALL_EVENT_ADD_FROM_BANNER_STARTED);
+    webapk::TrackUserAction(webapk::USER_ACTION_ADD_FROM_BANNER_ACCEPTED);
     return AcceptWebApk(web_contents);
   }
   return AcceptWebApp(web_contents);
@@ -309,6 +330,7 @@ bool AppBannerInfoBarDelegateAndroid::AcceptWebApk(
   // button is pressed, so request WebAPK installation. Otherwise, it means
   // the "Open" button is pressed, then open the installed WebAPK.
   if (webapk_package_name_.empty()) {
+    install_state_ = INSTALLING;
     // Request install the WebAPK.
     TrackUserResponse(USER_RESPONSE_WEB_APP_ACCEPTED);
 
@@ -340,6 +362,7 @@ bool AppBannerInfoBarDelegateAndroid::AcceptWebApk(
       env, java_delegate_, java_webapk_package_name);
 
   SendBannerAccepted(web_contents, "web");
+  webapk::TrackUserAction(webapk::USER_ACTION_INSTALLED_OPEN);
   return true;
 }
 
@@ -352,7 +375,7 @@ void AppBannerInfoBarDelegateAndroid::OnWebApkInstallFinished(
     if (infobar())
       infobar()->RemoveSelf();
     Java_AppBannerInfoBarDelegateAndroid_showWebApkInstallFailureToast(env);
-    DVLOG(1) << "The WebAPK installation failed.";

[dominickn, 2016/09/05 07:34:31]

Not sure if you want to remove the DVLOG here - remember that metrics are only
recorded for ~10% of Chrome's user base, so it may still be handy to have
something in the log. Not sure what the right thing to do is.

[Xi Han, 2016/09/07 20:58:52]

Good point, add the LOG back.

+    webapk::TrackInstallEvent(webapk::INSTALL_EVENT_FAILED);
     return;
   }
 
@@ -364,6 +387,8 @@ void AppBannerInfoBarDelegateAndroid::OnWebApkInstallFinished(
   Java_AppBannerInfoBarDelegateAndroid_setWebApkPackageName(
       env, java_delegate_, java_webapk_package_name);
   UpdateInstallState(env, nullptr);
+  install_state_ = INSTALLED;
+  webapk::TrackInstallEvent(webapk::INSTALL_EVENT_COMPLETED);
 }
 
 bool AppBannerInfoBarDelegateAndroid::LinkClicked(