[Chromoting] DirectX based capturer should always return a temporary error

webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc

Index: webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc
diff --git a/webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc b/webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc
index bdada9e3982244261a4f659ca74b4b5abf2126f3..eaf445de5f14176e6a04164a314e8c8d594ed351 100644
--- a/webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc
+++ b/webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc
@@ -619,8 +619,10 @@ void ScreenCapturerWinDirectx::Capture(const DesktopRegion& region) {
   RTC_DCHECK(callback_);
 
   if (!g_container->duplication && !DuplicateOutput()) {
-    // Failed to initialize desktop duplication.
-    callback_->OnCaptureResult(Result::ERROR_PERMANENT, nullptr);
+    // Failed to initialize desktop duplication. This usually happens when
+    // Windows is switching display mode. Retrying later usually resolve the

[Jamie, 2016/06/23 17:16:32]

s/resolve/resolves/

[Hzj_jie, 2016/06/23 18:42:07]

Done.

+    // issue.
+    callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
     return;
   }