Add AshDesktopMediaList and enable Desktop Capture API on Chrome OS.

chrome/browser/extensions/api/desktop_capture/desktop_capture_api.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/extensions/api/desktop_capture/desktop_capture_api.h"
 
 #include "base/compiler_specific.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
+#include "chrome/browser/media/ash_desktop_media_list.h"
 #include "chrome/browser/media/desktop_streams_registry.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
 #include "chrome/browser/media/native_desktop_media_list.h"
 #include "chrome/common/extensions/api/tabs.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_capture_options.h"
@@ skipping 138 matching lines @@
   }
 
   scoped_ptr<DesktopMediaList> media_list;
   if (g_picker_factory) {
     media_list = g_picker_factory->CreateModel(
         show_screens, show_windows);
     picker_ = g_picker_factory->CreatePicker();
   } else {
     // DesktopMediaPicker is implemented only for Windows, OSX and
     // Aura Linux builds.
-#if (defined(TOOLKIT_VIEWS) && !defined(OS_CHROMEOS)) || defined(OS_MACOSX)
+#if defined(USE_ASH)
+    media_list.reset(new AshDesktopMediaList(
+        (show_screens ? AshDesktopMediaList::SCREENS : 0) |
+        (show_windows ? AshDesktopMediaList::WINDOWS : 0)));
+    picker_ = DesktopMediaPicker::Create();
+#elif defined(TOOLKIT_VIEWS) || defined(OS_MACOSX)
     webrtc::DesktopCaptureOptions options =
         webrtc::DesktopCaptureOptions::CreateDefault();
     options.set_disable_effects(false);
     scoped_ptr<webrtc::ScreenCapturer> screen_capturer(
         show_screens ? webrtc::ScreenCapturer::Create(options) : NULL);
     scoped_ptr<webrtc::WindowCapturer> window_capturer(
         show_windows ? webrtc::WindowCapturer::Create(options) : NULL);
 
     media_list.reset(new NativeDesktopMediaList(
         screen_capturer.Pass(), window_capturer.Pass()));
@@ skipping 80 matching lines @@
 
 void DesktopCaptureRequestsRegistry::CancelRequest(int process_id,
                                                    int request_id) {
   RequestsMap::iterator it = requests_.find(RequestId(process_id, request_id));
   if (it != requests_.end())
     it->second->Cancel();
 }
 
 
 }  // namespace extensions