media: Support SetCdm() on VideoDecodeAccelerator interface.

media/video/video_decode_accelerator.cc

Index: media/video/video_decode_accelerator.cc
diff --git a/media/video/video_decode_accelerator.cc b/media/video/video_decode_accelerator.cc
index 6ffbda53b50a6f77b79b1a3139f7363494314326..0c6b2b98ad8746f4110bffceea84f7294154f4e6 100644
--- a/media/video/video_decode_accelerator.cc
+++ b/media/video/video_decode_accelerator.cc
@@ -9,8 +9,16 @@
 
 namespace media {
 
+void VideoDecodeAccelerator::Client::NotifyCdmAttached(bool success) {
+  NOTREACHED() << "By default CDM is not supported.";
+}
+
 VideoDecodeAccelerator::~VideoDecodeAccelerator() {}
 
+void VideoDecodeAccelerator::SetCdm(int cdm_id) {
+  NOTREACHED() << "By default CDM is not supported.";
+}
+
 bool VideoDecodeAccelerator::CanDecodeOnIOThread() {
   // GPU process subclasses must override this.
   LOG(FATAL) << "This should only get called in the GPU process";