Allows support for persistent session types in BrowserCdm.

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 ba2a680d39f86749e6b6a622694b6856a575070f..dc4da6c4a41f13c744dcbff91987315a11582ca7 100644
--- a/media/base/media_keys.h
+++ b/media/base/media_keys.h
@@ -72,7 +72,8 @@ class MEDIA_EXPORT MediaKeys{
   enum SessionType {
     TEMPORARY_SESSION,
     PERSISTENT_LICENSE_SESSION,
-    PERSISTENT_RELEASE_MESSAGE_SESSION
+    PERSISTENT_RELEASE_MESSAGE_SESSION,
+    SESSION_TYPE_MAX = PERSISTENT_RELEASE_MESSAGE_SESSION

[dcheng, 2015/05/29 22:32:58]

Hmm... we have both _MAX and _LAST. We should come up with a consistent naming
for this (especially since the clang plugin currently only checks _LAST).

[gunsch, 2015/05/29 23:03:10]

TIL there's a clang plugin check for this, that's helpful. Consistent within the
file but looks like broadly
(https://code.google.com/p/chromium/codesearch#search/&q=ENUM_TRAITS_MAX_VALUE)
not very consistent.

   };
 
   // Type of message being sent to the application.