[Chromoting] Improve DirectX capturer to support multiple outputs

webrtc/modules/desktop_capture/win/dxgi_context.cc

Index: webrtc/modules/desktop_capture/win/dxgi_context.cc
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCUIApplication.mm b/webrtc/modules/desktop_capture/win/dxgi_context.cc
similarity index 60%
copy from webrtc/sdk/objc/Framework/Classes/RTCUIApplication.mm
copy to webrtc/modules/desktop_capture/win/dxgi_context.cc
index 7e8aea62955dd61e20f3208150c780a99547ca4b..20904c5c1b692a1eb94b5c0327451561f55eca6d 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCUIApplication.mm
+++ b/webrtc/modules/desktop_capture/win/dxgi_context.cc
@@ -8,15 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "RTCUIApplication.h"
+#include "webrtc/modules/desktop_capture/win/dxgi_context.h"
 
-#if defined(WEBRTC_IOS)
+#include "webrtc/modules/desktop_capture/win/dxgi_duplicator_controller.h"
 
-#import <UIKit/UIKit.h>
+namespace webrtc {
 
-bool RTCIsUIApplicationActive() {
-  UIApplicationState state = [UIApplication sharedApplication].applicationState;
-  return state == UIApplicationStateActive;
+DxgiContext::~DxgiContext() {
+  DxgiDuplicatorController::Instance()->Unregister(this);
 }
 
-#endif // WEBRTC_IOS
+}  // namespace webrtc