Encrypted Media: Implement IPC based SetCdm().

content/renderer/media/android/proxy_media_keys.cc

Index: content/renderer/media/android/proxy_media_keys.cc
diff --git a/content/renderer/media/android/proxy_media_keys.cc b/content/renderer/media/android/proxy_media_keys.cc
index 9734e815e785ab7963e77947edfa159ec00d8c89..bd498a0d9694e1eaa448a815e1a9c6ca93b9c7a3 100644
--- a/content/renderer/media/android/proxy_media_keys.cc
+++ b/content/renderer/media/android/proxy_media_keys.cc
@@ -13,16 +13,18 @@
 
 namespace content {
 
+int ProxyMediaKeys::next_cdm_id_ =
+    RendererMediaPlayerManager::kInvalidCdmId + 1;
+
 ProxyMediaKeys::ProxyMediaKeys(
     RendererMediaPlayerManager* manager,
-    int cdm_id,
     const media::SessionCreatedCB& session_created_cb,
     const media::SessionMessageCB& session_message_cb,
     const media::SessionReadyCB& session_ready_cb,
     const media::SessionClosedCB& session_closed_cb,
     const media::SessionErrorCB& session_error_cb)
     : manager_(manager),
-      cdm_id_(cdm_id),
+      cdm_id_(next_cdm_id_++),
       session_created_cb_(session_created_cb),
       session_message_cb_(session_message_cb),
       session_ready_cb_(session_ready_cb),
@@ -111,4 +113,8 @@ void ProxyMediaKeys::OnSessionError(uint32 session_id,
   session_error_cb_.Run(session_id, error_code, system_code);
 }
 
+int ProxyMediaKeys::GetCdmId() const {
+  return cdm_id_;
+}
+
 }  // namespace content