media: Support CdmFactory in MojoMediaClient.

media/mojo/services/default_mojo_media_client.cc

Index: media/mojo/services/default_mojo_media_client.cc
diff --git a/media/mojo/services/default_mojo_media_client.cc b/media/mojo/services/default_mojo_media_client.cc
index 37448ba6c1dc5a9ed66d91499b70b9d8b9cbff97..5d19401bd62f90dbc954f664e59419b1708db719 100644
--- a/media/mojo/services/default_mojo_media_client.cc
+++ b/media/mojo/services/default_mojo_media_client.cc
@@ -10,6 +10,7 @@
 #include "media/audio/fake_audio_log_factory.h"
 #include "media/base/media.h"
 #include "media/base/null_video_sink.h"
+#include "media/cdm/default_cdm_factory.h"
 #include "media/renderers/default_renderer_factory.h"
 #include "media/renderers/gpu_video_accelerator_factories.h"
 
@@ -72,6 +73,10 @@ class DefaultMojoMediaClient : public PlatformMojoMediaClient {
     return *audio_hardware_config_;
   }
 
+  scoped_ptr<CdmFactory> GetCdmFactory() override {
+    return make_scoped_ptr(new DefaultCdmFactory());
+  }
+
  private:
   FakeAudioLogFactory fake_audio_log_factory_;
   scoped_ptr<AudioHardwareConfig> audio_hardware_config_;