Fix some clang warnings with -Wmissing-braces in WebRTC.

webrtc/modules/desktop_capture/desktop_frame_win.cc

Index: webrtc/modules/desktop_capture/desktop_frame_win.cc
diff --git a/webrtc/modules/desktop_capture/desktop_frame_win.cc b/webrtc/modules/desktop_capture/desktop_frame_win.cc
index 98bc902c4be33b95aa43871e87105dbb63850f75..c6d7ccfcb95dfbef4a4ef72de878db5900b58725 100644
--- a/webrtc/modules/desktop_capture/desktop_frame_win.cc
+++ b/webrtc/modules/desktop_capture/desktop_frame_win.cc
@@ -35,7 +35,7 @@ DesktopFrameWin* DesktopFrameWin::Create(DesktopSize size,
   int bytes_per_row = size.width() * kBytesPerPixel;
 
   // Describe a device independent bitmap (DIB) that is the size of the desktop.
-  BITMAPINFO bmi = {0};
+  BITMAPINFO bmi = {};
   bmi.bmiHeader.biHeight = -size.height();
   bmi.bmiHeader.biWidth = size.width();
   bmi.bmiHeader.biPlanes = 1;