Implement checks for distinctiveIdentifier and persistentState in requestMediaKeySystemAccess().

media/base/eme_constants.h

Index: media/base/eme_constants.h
diff --git a/media/base/eme_constants.h b/media/base/eme_constants.h
index e78af3b7caa5a0efd00ed592121aa523f5342fef..eb08382f01a9a01f86f811557ad819254124ba34 100644
--- a/media/base/eme_constants.h
+++ b/media/base/eme_constants.h
@@ -46,8 +46,23 @@ enum EmeCodec {
 #endif  // defined(USE_PROPRIETARY_CODECS)
 };
 
+enum EmeSessionType {
+  EME_SESSION_TYPE_NONE = 0,
+  EME_SESSION_TYPE_TEMPORARY = 1 << 0,
+  EME_SESSION_TYPE_PERSISTENT_LICENSE = 1 << 1,
+  EME_SESSION_TYPE_PERSISTENT_RELEASE_MESSAGE = 1 << 2,
+};
+
 typedef uint32_t SupportedInitDataTypes;
 typedef uint32_t SupportedCodecs;
+typedef uint32_t SupportedSessionTypes;
+
+enum EmeRequirement {
+  EME_REQUIREMENT_NOT_ALLOWED = 1 << 0,

[ddorwin, 2015/02/17 20:56:47]

Would it make sense (and help with the code) to have a different set of values
when specifying key system capabilities? For example, SUPPORTS_NOT_ALLOWED,
REQUIRES_ALWAYS, WILL_USE_IF_ALLOWED.

[sandersd (OOO until July 31), 2015/02/18 23:41:17]

Done.

+  EME_REQUIREMENT_REQUIRED = 1 << 1,
+  EME_REQUIREMENT_OPTIONAL =

[ddorwin, 2015/02/17 20:56:47]

Embedders should never use this, right? Maybe it shouldn't be in this file. I'm
not sure "OPTIONAL" here has the same meaning as the spec - it's really just
"supports both", which we probably don't need. Also, see above.

[sandersd (OOO until July 31), 2015/02/18 23:41:17]

Acknowledged.

+      EME_REQUIREMENT_NOT_ALLOWED | EME_REQUIREMENT_REQUIRED,
+};
 
 }  // namespace media