Add WebAPK installation metrics.

chrome/browser/android/banners/app_banner_infobar_delegate_android.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_ANDROID_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 61 matching lines @@
                          jboolean success);
 
   // When user accepts to install a WebAPK, this function sends a request
   // to the WebAPK Server to create a WebAPK and install it. It returns
   // false to prevent infobar from disappearing when installation starts.
   // When user clicks the Open button after the intallation is compelete, this
   // function launches the installed WebAPK and returns true.
   bool AcceptWebApk(content::WebContents* web_contents);
 
  private:
+  // The states of a WebAPK installation, where the infobar is displayed during
+  // the entire installation process. This state is used to correctly record
+  // UMA metrics.
+  enum InstallState {
+    INSTALL_NOT_STARTED,
+    INSTALLING,
+    INSTALLED,
+  };
+
   // Delegate for promoting a web app.
   AppBannerInfoBarDelegateAndroid(
       base::WeakPtr<AppBannerManager> weak_manager,
       const base::string16& app_title,
       std::unique_ptr<ShortcutInfo> info,
       std::unique_ptr<SkBitmap> icon,
       int event_request_id,
       bool is_webapk);
 
   // Delegate for promoting an Android app.
   AppBannerInfoBarDelegateAndroid(
       const base::string16& app_title,
       const base::android::ScopedJavaGlobalRef<jobject>& native_app_data,
       std::unique_ptr<SkBitmap> icon,
       const std::string& native_app_package,
       const std::string& referrer,
       int event_request_id);
 
   void CreateJavaDelegate();
   bool AcceptNativeApp(content::WebContents* web_contents);
   bool AcceptWebApp(content::WebContents* web_contents);
   void SendBannerAccepted(content::WebContents* web_contents,
                           const std::string& platform);
   void OnWebApkInstallFinished(bool success, const std::string& webapk_package);
+  void TrackWebApkInstallationDismissEvents(InstallState install_state);
 
   // ConfirmInfoBarDelegate:
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   gfx::Image GetIcon() const override;
   void InfoBarDismissed() override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   bool Accept() override;
   bool LinkClicked(WindowOpenDisposition disposition) override;
 
@@ skipping 10 matching lines @@
   std::unique_ptr<SkBitmap> icon_;
 
   std::string native_app_package_;
   std::string referrer_;
   int event_request_id_;
   bool has_user_interaction_;
 
   std::string webapk_package_name_;
   bool is_webapk_;
 
+  // Indicates the current state of a WebAPK installation.
+  InstallState install_state_;
+
   base::WeakPtrFactory<AppBannerInfoBarDelegateAndroid> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AppBannerInfoBarDelegateAndroid);
 };
 
 // Register native methods.
 bool RegisterAppBannerInfoBarDelegateAndroid(JNIEnv* env);
 
 }  // namespace banners
 
 #endif  // CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_ANDROID_H_