Allow Windows to return a monitor out of the first quadrant

webrtc/modules/desktop_capture/win/dxgi_output_duplicator.cc

Index: webrtc/modules/desktop_capture/win/dxgi_output_duplicator.cc
diff --git a/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.cc b/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.cc
index fb8dacb720a34b55f051e999463c8f2091d27f5b..d27d0f8c6d940c2b0603b19ccaf1d7e45316383d 100644
--- a/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.cc
+++ b/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.cc
@@ -67,7 +67,7 @@ DxgiOutputDuplicator::DxgiOutputDuplicator(const D3dDevice& device,
       desktop_rect_(RECTToDesktopRect(desc.DesktopCoordinates)) {
   RTC_DCHECK(output_);
   RTC_DCHECK(!desktop_rect_.is_empty());
-  RTC_DCHECK(desktop_rect_.left() >= 0 && desktop_rect_.top() >= 0);
+  RTC_DCHECK(desktop_rect_.width() > 0 && desktop_rect_.height() > 0);
 }
 
 DxgiOutputDuplicator::DxgiOutputDuplicator(DxgiOutputDuplicator&& other) =
@@ -381,4 +381,9 @@ int64_t DxgiOutputDuplicator::num_frames_captured() const {
   return num_frames_captured_;
 }
 
+void DxgiOutputDuplicator::Translate(int32_t dx, int32_t dy) {
+  desktop_rect_.Translate(dx, dy);
+  RTC_DCHECK(desktop_rect_.left() >= 0 && desktop_rect_.top() >= 0);
+}
+
 }  // namespace webrtc