Update fullscreen ux, make floor and ceiling visible.

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellImpl.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.vr_shell;
 
 import android.annotation.SuppressLint;
 import android.graphics.Canvas;
 import android.graphics.Point;
 import android.os.StrictMode;
@@ skipping 50 matching lines @@
     // a way to compute good values for any screen size/scaling ratio.
 
     // Increasing DPR any more than this doesn't appear to increase text quality.
     private static final float DEFAULT_DPR = 1.2f;
     // For WebVR we just create a DPR 1.0 display that matches the physical display size.
     private static final float WEBVR_DPR = 1.0f;
     // Fairly arbitrary values that put a good amount of content on the screen without making the
     // text too small to read.
     private static final float DEFAULT_CONTENT_WIDTH = 960f;
     private static final float DEFAULT_CONTENT_HEIGHT = 640f;
-    // Make full screen 16:9 while maintaining same width as default.
-    private static final float FULLSCREEN_CONTENT_WIDTH = 960f;
-    private static final float FULLSCREEN_CONTENT_HEIGHT = 540f;
+
+    // Make full screen 16:9 until we get exact dimensions from playing video.
+    private static final float FULLSCREEN_CONTENT_WIDTH = 1024f;
+    private static final float FULLSCREEN_CONTENT_HEIGHT = 576f;
 
     private final ChromeActivity mActivity;
     private final VrShellDelegate mDelegate;
     private final VirtualDisplayAndroid mContentVirtualDisplay;
     private final TabRedirectHandler mTabRedirectHandler;
     private final TabObserver mTabObserver;
     private final TabModelSelectorObserver mTabModelSelectorObserver;
     private final View.OnTouchListener mTouchListener;
     private TabModelSelectorTabObserver mTabModelSelectorTabObserver;
 
@@ skipping 544 matching lines @@
     private native void nativeOnTabListCreated(long nativeVrShell, Tab[] mainTabs,
             Tab[] incognitoTabs);
     private native void nativeOnTabUpdated(long nativeVrShell, boolean incognito, int id,
             String title);
     private native void nativeOnTabRemoved(long nativeVrShell, boolean incognito, int id);
     private native Surface nativeTakeContentSurface(long nativeVrShell);
     private native void nativeRestoreContentSurface(long nativeVrShell);
     private native void nativeSetHistoryButtonsEnabled(
             long nativeVrShell, boolean canGoBack, boolean canGoForward);
 }