ImageCapture: support enhanced FocusMode getting/setting

third_party/WebKit/Source/modules/imagecapture/PhotoCapabilities.cpp

 // 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 "modules/imagecapture/PhotoCapabilities.h"
 
 namespace blink {
 
 // static
 PhotoCapabilities* PhotoCapabilities::create()
 {
     return new PhotoCapabilities();
 }
 
 String PhotoCapabilities::focusMode() const
 {
     switch (m_focusMode) {
     case media::mojom::blink::FocusMode::UNAVAILABLE:
         return "unavailable";
-    case media::mojom::blink::FocusMode::AUTO:
-        return "auto";
     case media::mojom::blink::FocusMode::MANUAL:
         return "manual";
+    case media::mojom::blink::FocusMode::SINGLE_SHOT:
+        return "single-shot";
+    case media::mojom::blink::FocusMode::CONTINUOUS:
+        return "continuous";
     default:
         NOTREACHED();
     }
     return emptyString();
 }
 
 DEFINE_TRACE(PhotoCapabilities)
 {
     visitor->trace(m_iso);
     visitor->trace(m_imageHeight);
     visitor->trace(m_imageWidth);
     visitor->trace(m_zoom);
 }
 
 } // namespace blink