Refactor Vr activity into ChromeTabbedActivity.

chrome/android/java/src/org/chromium/chrome/browser/VrActivity.java

-// Copyright 2016 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.
-
-package org.chromium.chrome.browser;
-
-import android.graphics.PixelFormat;
-import android.view.View;
-import android.view.Window;
-import android.view.WindowManager;
-
-import org.chromium.chrome.browser.init.AsyncInitializationActivity;
-import org.chromium.chrome.browser.vr_shell.VrShell;
-
-/**
- * A subclass of AsyncInitializationActivity, used in Daydream VR mode.
- * TODO(bshe): This activity needs to access the same set of tabs as ChromeTabbedActivity.
- * See more detail in crbug.com/641038.
- *
- */
-public class VrActivity extends AsyncInitializationActivity {
-    private VrShell mVrShellView;
-
-    @Override
-    public void onResume() {
-        super.onResume();
-        mVrShellView.onResume();
-    }
-
-    @Override
-    public void onPause() {
-        super.onPause();
-        mVrShellView.onPause();
-    }
-
-    @Override
-    public void onDestroy() {
-        super.onDestroy();
-        if (mVrShellView != null) {
-            mVrShellView.shutdown();
-            mVrShellView = null;
-        }
-    }
-
-    @Override
-    public void initializeCompositor() {
-        super.initializeCompositor();
-        mVrShellView.onNativeLibraryReady();
-    }
-
-    @Override
-    public void setContentView() {
-        setupVrModeWindowFlags();
-        addVrViews();
-    }
-
-    private void addVrViews() {
-        mVrShellView = new VrShell(this);
-        WindowManager.LayoutParams params = new WindowManager.LayoutParams(
-                WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT,
-                WindowManager.LayoutParams.TYPE_APPLICATION, 0, PixelFormat.OPAQUE);
-        setContentView(mVrShellView, params);
-    }
-
-    private void setupVrModeWindowFlags() {
-        Window window = getWindow();
-        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
-        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
-                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
-                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN
-                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-    }
-}