Reland: Video capture Android: enable unittests for Camera2 API

media/capture/video/android/java/src/org/chromium/media/VideoCapture.java

 // Copyright 2014 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.media;
 
 import android.content.Context;
 import android.graphics.ImageFormat;
 import android.view.Surface;
 import android.view.WindowManager;
@@ skipping 16 matching lines @@
     // In some occasions we need to invert the device rotation readings, see the
     // individual implementations.
     protected boolean mInvertDeviceOrientationReadings;
 
     protected VideoCaptureFormat mCaptureFormat = null;
     protected final Context mContext;
     protected final int mId;
     // Native callback context variable.
     protected final long mNativeVideoCaptureDeviceAndroid;
 
+    protected boolean mUseBackgroundThreadForTesting = false;
+
     VideoCapture(Context context, int id, long nativeVideoCaptureDeviceAndroid) {
         mContext = context;
         mId = id;
         mNativeVideoCaptureDeviceAndroid = nativeVideoCaptureDeviceAndroid;
     }
 
     // Allocate necessary resources for capture.
     @CalledByNative
     public abstract boolean allocate(int width, int height, int frameRate);
 
@@ skipping 55 matching lines @@
             case ImageFormat.YUV_420_888:
                 return AndroidImageFormat.YUV_420_888;
             case ImageFormat.NV21:
                 return AndroidImageFormat.NV21;
             case ImageFormat.UNKNOWN:
             default:
                 return AndroidImageFormat.UNKNOWN;
         }
     }
 
+    @CalledByNative
+    public final void setTestMode() {
+        mUseBackgroundThreadForTesting = true;
+    }
+
     protected final int getCameraRotation() {
         int rotation = mInvertDeviceOrientationReadings ? (360 - getDeviceRotation())
                                                         : getDeviceRotation();
         return (mCameraNativeOrientation + rotation) % 360;
     }
 
     protected final int getDeviceRotation() {
         if (mContext == null) return 0;
         final int orientation;
         WindowManager wm = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
@@ skipping 24 matching lines @@
             int uvRowStride, int uvPixelStride, int width, int height, int rotation,
             long timestamp);
 
     // Method for VideoCapture implementations to signal an asynchronous error.
     public native void nativeOnError(long nativeVideoCaptureDeviceAndroid, String message);
 
     // Method for VideoCapture implementations to send Photos back to.
     public native void nativeOnPhotoTaken(
             long nativeVideoCaptureDeviceAndroid, long callbackId, byte[] data);
 }