Replace ASSERT by RTC_DCHECK in all non-test code.

webrtc/base/win32window.cc

Index: webrtc/base/win32window.cc
diff --git a/webrtc/base/win32window.cc b/webrtc/base/win32window.cc
index 4d41014054124321f32d0ad443cb67a86687a759..daa7688554863a26d772e36738e93f87c825fefc 100644
--- a/webrtc/base/win32window.cc
+++ b/webrtc/base/win32window.cc
@@ -8,6 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include "webrtc/base/checks.h"
 #include "webrtc/base/common.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/win32window.h"
@@ -26,7 +27,7 @@ Win32Window::Win32Window() : wnd_(NULL) {
 }
 
 Win32Window::~Win32Window() {
-  ASSERT(NULL == wnd_);
+  RTC_DCHECK(NULL == wnd_);
 }
 
 bool Win32Window::Create(HWND parent, const wchar_t* title, DWORD style,