Enable magic window mode with new Gvr

device/vr/android/java/src/org/chromium/device/vr/GvrDeviceProvider.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.device.vr;
-
-import android.content.Context;
-import android.os.StrictMode;
-
-import com.google.vr.ndk.base.GvrLayout;
-
-import org.chromium.base.Log;
-import org.chromium.base.annotations.CalledByNative;
-import org.chromium.base.annotations.JNINamespace;
-
-/**
- * This is the implementation of the C++ counterpart GvrDeviceProvider.
- */
-@JNINamespace("device")
-class GvrDeviceProvider {
-    private static final String TAG = "GvrDeviceProvider";
-    private final GvrLayout mLayout;
-
-    private GvrDeviceProvider(Context context) {
-        mLayout = new GvrLayout(context);
-    }
-
-    @CalledByNative
-    private static GvrDeviceProvider create(Context context) {
-        return new GvrDeviceProvider(context);
-    }
-
-    @CalledByNative
-    private long getNativeContext() {
-        long nativeGvrContext = 0;
-
-        StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
-
-        try {
-            nativeGvrContext = mLayout.getGvrApi().getNativeGvrContext();
-        } catch (Exception ex) {
-            Log.e(TAG, "Unable to instantiate GvrApi", ex);
-            return 0;
-        } finally {
-            StrictMode.setThreadPolicy(oldPolicy);
-        }
-
-        return nativeGvrContext;
-    }
-
-    @CalledByNative
-    private void shutdown() {
-        mLayout.shutdown();
-    }
-}