Revert of Video capture Android: enable unittests for Camera2 API

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

Index: media/capture/video/android/java/src/org/chromium/media/VideoCapture.java
diff --git a/media/capture/video/android/java/src/org/chromium/media/VideoCapture.java b/media/capture/video/android/java/src/org/chromium/media/VideoCapture.java
index 4e0aff02fe021ae8989d97f386539e1a1da27173..42931f333bb4ca9f8eb7436b9adac71ad50ac356 100644
--- a/media/capture/video/android/java/src/org/chromium/media/VideoCapture.java
+++ b/media/capture/video/android/java/src/org/chromium/media/VideoCapture.java
@@ -33,8 +33,6 @@
     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;
@@ -111,11 +109,6 @@
         }
     }
 
-    @CalledByNative
-    public final void setTestMode() {
-        mUseBackgroundThreadForTesting = true;
-    }
-
     protected final int getCameraRotation() {
         int rotation = mInvertDeviceOrientationReadings ? (360 - getDeviceRotation())
                                                         : getDeviceRotation();