DirectX based screen capturer logic

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 f139fb5cddf2bb7ea2b71a668fddb940b23441c0..2b4478fdfc219fc44d7cacdb804ef94187cf3df6 100644
--- a/webrtc/modules/desktop_capture/desktop_frame_win.cc
+++ b/webrtc/modules/desktop_capture/desktop_frame_win.cc
@@ -10,6 +10,7 @@
 
 #include "webrtc/modules/desktop_capture/desktop_frame_win.h"
 
+#include <assert.h>
 #include <utility>
 
 #include "webrtc/system_wrappers/include/logging.h"
@@ -34,7 +35,7 @@ DesktopFrameWin* DesktopFrameWin::Create(
     DesktopSize size,
     SharedMemoryFactory* shared_memory_factory,
     HDC hdc) {
-  int bytes_per_row = size.width() * kBytesPerPixel;
+  int bytes_per_row = size.width() * DesktopFrame::kBytesPerPixel;
   int buffer_size = bytes_per_row * size.height();
 
   // Describe a device independent bitmap (DIB) that is the size of the desktop.
@@ -42,9 +43,9 @@ DesktopFrameWin* DesktopFrameWin::Create(
   bmi.bmiHeader.biHeight = -size.height();
   bmi.bmiHeader.biWidth = size.width();
   bmi.bmiHeader.biPlanes = 1;
-  bmi.bmiHeader.biBitCount = DesktopFrameWin::kBytesPerPixel * 8;
+  bmi.bmiHeader.biBitCount = DesktopFrame::kBytesPerPixel * 8;
   bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
-  bmi.bmiHeader.biSizeImage = bytes_per_row * size.height();
+  bmi.bmiHeader.biSizeImage = buffer_size;
 
   std::unique_ptr<SharedMemory> shared_memory;
   HANDLE section_handle = nullptr;