V4L2: avoid resetting zoom controls

media/capture/video/linux/v4l2_capture_delegate_unittest.cc

 // 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.
 
 #include <sys/fcntl.h>
 #include <sys/ioctl.h>
 
 #include "base/files/file_enumerator.h"
 #include "base/run_loop.h"
 #include "base/test/scoped_task_environment.h"
@@ skipping 39 matching lines @@
     case V4L2_CID_AUTO_WHITE_BALANCE:
     case V4L2_CID_EXPOSURE_AUTO:
     case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
     case V4L2_CID_FOCUS_AUTO:
     case V4L2_CID_PAN_RELATIVE:
     case V4L2_CID_TILT_RELATIVE:
     case V4L2_CID_PAN_RESET:
     case V4L2_CID_TILT_RESET:
     case V4L2_CID_PAN_ABSOLUTE:
     case V4L2_CID_TILT_ABSOLUTE:
+    case V4L2_CID_ZOOM_ABSOLUTE:
+    case V4L2_CID_ZOOM_RELATIVE:
+    case V4L2_CID_ZOOM_CONTINUOUS:
     case V4L2_CID_PAN_SPEED:
     case V4L2_CID_TILT_SPEED:
     case V4L2_CID_PANTILT_CMD:
       return true;
   }
   return false;
 }
 
 static void SetControlsToMaxValues(int device_fd) {
   // Set V4L2_CID_AUTO_WHITE_BALANCE to false first.
@@ skipping 203 matching lines @@
   // their |default_value|s.
   {
     base::ScopedFD device_fd(
         HANDLE_EINTR(open(device_descriptor_.device_id.c_str(), O_RDWR)));
     ASSERT_TRUE(device_fd.is_valid());
     VerifyUserControlsAreSetToDefaultValues(device_fd.get());
   }
 }
 
 };  // namespace media