Allow Windows to return a monitor out of the first quadrant

webrtc/modules/desktop_capture/win/dxgi_adapter_duplicator.cc

Index: webrtc/modules/desktop_capture/win/dxgi_adapter_duplicator.cc
diff --git a/webrtc/modules/desktop_capture/win/dxgi_adapter_duplicator.cc b/webrtc/modules/desktop_capture/win/dxgi_adapter_duplicator.cc
index caef1c2ca7b67c802b73040fd8f5337488187150..2d82339af1711d1e9f74ce5c6d1a13a6d7a60dc6 100644
--- a/webrtc/modules/desktop_capture/win/dxgi_adapter_duplicator.cc
+++ b/webrtc/modules/desktop_capture/win/dxgi_adapter_duplicator.cc
@@ -25,8 +25,7 @@ using Microsoft::WRL::ComPtr;
 namespace {
 
 bool IsValidRect(const RECT& rect) {
-  return rect.left >= 0 && rect.top >= 0 && rect.right > rect.left &&
-         rect.bottom > rect.top;
+  return rect.right > rect.left && rect.bottom > rect.top;
 }
 
 }  // namespace
@@ -153,4 +152,12 @@ int64_t DxgiAdapterDuplicator::GetNumFramesCaptured() const {
   return min;
 }
 
+void DxgiAdapterDuplicator::Translate(int32_t dx, int32_t dy) {

[Sergey Ulanov, 2017/04/28 01:15:02]

Use DesktopVector to pass the parameters

[Sergey Ulanov, 2017/04/28 01:15:02]

TranslateRect()?

[Hzj_jie, 2017/04/28 01:58:32]

Done.

[Hzj_jie, 2017/04/28 01:58:32]

Done.

+  desktop_rect_.Translate(dx, dy);
+  RTC_DCHECK(desktop_rect_.left() >= 0 && desktop_rect_.top() >= 0);
+  for (auto& duplicator : duplicators_) {
+    duplicator.Translate(dx, dy);
+  }
+}
+
 }  // namespace webrtc