Encrypted Media: Implement IPC based SetCdm().

media/base/media_keys.h

Index: media/base/media_keys.h
diff --git a/media/base/media_keys.h b/media/base/media_keys.h
index a6ef64ceee0ea8d62a4ad8e29b1401351c766963..07ecd9189cb889aa8763b3c5c2ea4312c889c4aa 100644
--- a/media/base/media_keys.h
+++ b/media/base/media_keys.h
@@ -38,6 +38,7 @@ class MEDIA_EXPORT MediaKeys {
   };
 
   const static uint32 kInvalidSessionId = 0;
+  const static int kInvalidCdmId = -1;
 
   MediaKeys();
   virtual ~MediaKeys();
@@ -72,6 +73,10 @@ class MEDIA_EXPORT MediaKeys {
   // to be valid during the MediaKeys' lifetime.
   virtual Decryptor* GetDecryptor();
 
+  // Gets the CDM ID associated with the MediaKeys. Returns kInvalidCdmId if no
+  // CDM ID is associated.
+  virtual int GetCdmId();

[ddorwin, 2014/03/11 04:06:33]

Too bad this has to be on the main interface. :(

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

As discussed, I think we can avoid this.

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

Removed.

+
  private:
   DISALLOW_COPY_AND_ASSIGN(MediaKeys);
 };