Remove DesktopRegion parameter from DesktopCapturer::Capture

webrtc/modules/desktop_capture/window_capturer_unittest.cc

Index: webrtc/modules/desktop_capture/window_capturer_unittest.cc
diff --git a/webrtc/modules/desktop_capture/window_capturer_unittest.cc b/webrtc/modules/desktop_capture/window_capturer_unittest.cc
index 1a8e4d07e700208518cca2db1ad7cbffa74ef4df..b2ee2e86a8d694d766fa08acaee29ce913e6b342 100644
--- a/webrtc/modules/desktop_capture/window_capturer_unittest.cc
+++ b/webrtc/modules/desktop_capture/window_capturer_unittest.cc
@@ -70,7 +70,7 @@ TEST_F(WindowCapturerTest, Capture) {
        it != windows.end(); ++it) {
     frame_.reset();
     if (capturer_->SelectWindow(it->id)) {
-      capturer_->Capture(DesktopRegion());
+      capturer_->Capture();
     }
 
     // If we failed to capture a window make sure it no longer exists.