media: Rename MediaKeys to ContentDecryptionModule

media/base/decryptor.h

Index: media/base/decryptor.h
diff --git a/media/base/decryptor.h b/media/base/decryptor.h
index 58c92e6a9c9c598fd76b4a8e9612f8226d4a2f31..3b1a2453f3d898c69fffada022a9ab712d3a1ffd 100644
--- a/media/base/decryptor.h
+++ b/media/base/decryptor.h
@@ -42,8 +42,8 @@ class MEDIA_EXPORT Decryptor {
   Decryptor();
   virtual ~Decryptor();
 
-  // Indicates that a new key has been added to the MediaKeys object associated
-  // with the Decryptor.
+  // Indicates that a new key has been added to the ContentDecryptionModule
+  // object associated with the Decryptor.
   typedef base::Callback<void()> NewKeyCB;
 
   // Registers a NewKeyCB which should be called when a new key is added to the