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..c6b016754b48104501af29385ca448930922ee18 100644
--- a/media/base/eme_constants.h
+++ b/media/base/eme_constants.h
@@ -49,6 +49,37 @@ enum EmeCodec {
 typedef uint32_t SupportedInitDataTypes;
 typedef uint32_t SupportedCodecs;
 
+enum EmeSessionTypeSupport {
+  // Invalid value.
+  EME_SESSION_TYPE_SUPPORT_NOT_DECLARED,

[ddorwin, 2015/02/19 01:41:33]

nit: This name makes it seem valid. INVALID or something like that would be
clearer. UNINITIALIZED?

[sandersd (OOO until July 31), 2015/02/19 21:08:34]

Done.

+  // The session type is not available.

[ddorwin, 2015/02/19 01:41:33]

s/available/supported/?

and line 57

[sandersd (OOO until July 31), 2015/02/19 21:08:34]

Done.

+  EME_SESSION_TYPE_NOT_SUPPORTED,
+  // The session type is available if the encrypted media permission is granted.
+  EME_SESSION_TYPE_SUPPORTED_WITH_PERMISSION,
+  // The session type is always available.
+  EME_SESSION_TYPE_SUPPORTED,
+};
+
+enum EmeFeatureSupport {
+  // Invalid value.
+  EME_FEATURE_SUPPORT_NOT_DECLARED,
+  // Access to the feature is not supported at all.
+  EME_FEATURE_NOT_SUPPORTED,
+  // Access to the feature is supported if the encrypted media permission is
+  // granted.
+  EME_FEATURE_SUPPORTED_WITH_PERMISSION,

[ddorwin, 2015/02/19 04:23:41]

s/SUPPORTED/REQUESTABLE/ or something like that to differentiate from ALWAYS
(without having to understand the intricacies).
Ditto below.

+  // Access to the feature is available if requested.
+  EME_FEATURE_SUPPORTED,
+  // Access to the feature cannot be blocked.
+  EME_FEATURE_ALWAYS_AVAILABLE,

[ddorwin, 2015/02/19 01:41:33]

s/AVAILABLE/USED/ ?

[sandersd (OOO until July 31), 2015/02/19 21:08:34]

Done.

+};
+
+enum EmeFeatureRequirement {
+  EME_FEATURE_NOT_ALLOWED,
+  EME_FEATURE_OPTIONAL,
+  EME_FEATURE_REQUIRED,
+};
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_EME_CONSTANTS_H_