Update stable to r4698.

git-svn-id: http://webrtc.googlecode.com/svn/stable/talk@4699 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/media/base/videoadapter.cc b/media/base/videoadapter.cc
index d2b6ca3..20114fb 100644
--- a/media/base/videoadapter.cc
+++ b/media/base/videoadapter.cc
@@ -248,7 +248,8 @@
   ++frames_;
 
   // Update input to actual frame dimensions.
-  VideoFormat format(in_frame->GetWidth(), in_frame->GetHeight(),
+  VideoFormat format(static_cast<int>(in_frame->GetWidth()),
+                     static_cast<int>(in_frame->GetHeight()),
                      input_format_.interval, input_format_.fourcc);
   SetInputFormat(format);