Encrypted Media: Implement IPC based SetCdm().

content/renderer/media/android/proxy_media_keys.h

Index: content/renderer/media/android/proxy_media_keys.h
diff --git a/content/renderer/media/android/proxy_media_keys.h b/content/renderer/media/android/proxy_media_keys.h
index dd0f99e9f91b4ff51cc5d443ac43076e4433d837..ca14047585e81b7567e25f92543303103ab25f4c 100644
--- a/content/renderer/media/android/proxy_media_keys.h
+++ b/content/renderer/media/android/proxy_media_keys.h
@@ -42,6 +42,7 @@ class ProxyMediaKeys : public media::MediaKeys {
                              const uint8* response,
                              int response_length) OVERRIDE;
   virtual void ReleaseSession(uint32 session_id) OVERRIDE;
+  virtual int GetCdmId() OVERRIDE;

[ddorwin, 2014/03/11 18:05:14]

This will not be in the base class, but the factory will use it when it knows it
has created this object.

We could use a Create method that returns the ID. I'm not sure whether that will
be better or worse at the factory call site.

[xhwang, 2014/03/12 01:07:52]

Done. I am keeping a GetCdmId() function in ProxyMediaKeys because the class
needs to store the cdm_id_ anyways (for sending IPCs).

 
   // Callbacks.
   void OnSessionCreated(uint32 session_id, const std::string& web_session_id);