Implement Desktop Media Picker (Mac version) for Desktop Capture API

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/media/desktop_streams_registry.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"
 #include "third_party/webrtc/modules/desktop_capture/window_capturer.h"
 
 namespace extensions {
 
 namespace {
@@ skipping 63 matching lines @@
   } else {
     origin_ = GetExtension()->url();
   }
 
   scoped_ptr<DesktopMediaPickerModel> model;
   if (g_picker_factory) {
     model = g_picker_factory->CreateModel(
         screen_capturer.Pass(), window_capturer.Pass());
     picker_ = g_picker_factory->CreatePicker();
   } else {
-    // Currently DesktopMediaPicker is implemented only for platforms that
-    // use Views.
-#if defined(TOOLKIT_VIEWS)
+    // DesktopMediaPicker is not implented for all platforms yet.
+#if defined(TOOLKIT_VIEWS) || defined(OS_MACOSX)
     model.reset(new DesktopMediaPickerModel(
         screen_capturer.Pass(), window_capturer.Pass()));
     picker_ = DesktopMediaPicker::Create();
 #else
     error_ = kNotImplementedError;
     return false;
 #endif
   }
   DesktopMediaPicker::DoneCallback callback = base::Bind(
       &DesktopCaptureChooseDesktopMediaFunction::OnPickerDialogResults, this);
@@ skipping 10 matching lines @@
         MediaCaptureDevicesDispatcher::GetInstance()->
         GetDesktopStreamsRegistry();
     result = registry->RegisterStream(origin_, source);
   }
 
   SetResult(new base::StringValue(result));
   SendResponse(true);
 }
 
 }  // namespace extensions