Add interface for DesktopMediaPickerModel

chrome/browser/media/desktop_media_picker_model.cc

 // Copyright 2013 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 "chrome/browser/media/desktop_media_picker_model.h"
 
 #include <map>
 
 #include "base/hash.h"
 #include "base/logging.h"
@@ skipping 240 matching lines @@
   DCHECK(!observer_);
   DCHECK(screen_capturer_ || window_capturer_);
 
   observer_ = observer;
 
   worker_.reset(new Worker(weak_factory_.GetWeakPtr(),
                            screen_capturer_.Pass(), window_capturer_.Pass()));
   Refresh();
 }
 
+int DesktopMediaPickerModel::source_count() const {
+  return sources_.size();
+}
+
+const DesktopMediaPickerModel::Source& DesktopMediaPickerModel::source(
+    int index) const {
+  return sources_[index];
+}
+
 // static
 bool DesktopMediaPickerModel::CompareSources(const SourceDescription& a,
                                              const SourceDescription& b) {
   return a.id < b.id;
 }
 
 void DesktopMediaPickerModel::Refresh() {
   capture_task_runner_->PostTask(
       FROM_HERE, base::Bind(&Worker::Refresh, base::Unretained(worker_.get()),
                             thumbnail_size_));
@@ skipping 35 matching lines @@
   sources_[index].thumbnail = image;
   observer_->OnSourceThumbnailChanged(index);
 }
 
 void DesktopMediaPickerModel::OnRefreshFinished() {
   BrowserThread::PostDelayedTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&DesktopMediaPickerModel::Refresh, weak_factory_.GetWeakPtr()),
       update_period_);
 }