MediaStream Image Capture (3): Adding mojo and browser impl for dummy takePhoto().

content/browser/media/capture/image_capture_impl.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 "content/browser/media/capture/image_capture_impl.h"
+
+#include "base/bind_helpers.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+ImageCaptureImpl::ImageCaptureImpl(
+    mojo::InterfaceRequest<blink::mojom::ImageCapture> request)
+    : binding_(this, std::move(request)) {
+  DVLOG(1) << __FUNCTION__;
+}
+
+ImageCaptureImpl::~ImageCaptureImpl() {}
+
+void ImageCaptureImpl::TakePhoto(const mojo::String& sourceid,
+                                 const TakePhotoCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  // TODO(mcasas): Implement this feature., https://crbug.com/518807.
+  callback.Run("text/plain", "not implemented");
+}
+
+}  // namespace content