EME: Update MediaKeySystemConfiguration defaults; require non-empty capabilities

third_party/WebKit/Source/core/frame/Deprecation.cpp

Index: third_party/WebKit/Source/core/frame/Deprecation.cpp
diff --git a/third_party/WebKit/Source/core/frame/Deprecation.cpp b/third_party/WebKit/Source/core/frame/Deprecation.cpp
index 9a3def4c1f871e2f73a635babb7ee67c40c38a90..3334fd8c30eb5f2a49a5c08681f3a91f0de8caf0 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -346,6 +346,9 @@ String Deprecation::deprecationMessage(UseCounter::Feature feature)
     case UseCounter::EncryptedMediaAllSelectedContentTypesMissingCodecs:
         return String::format("EME requires that contentType strings accepted by requestMediaKeySystemAccess() include codecs. Non-standard support for contentType strings without codecs will be removed in %s. Please specify the desired codec(s) as part of the contentType.", milestoneString(56));
 
+    case UseCounter::EncryptedMediaCapabilityNotProvided:
+        return String::format("EME requires that one of 'audioCapabilities' and 'videoCapabilities' must be non-empty. Non-standard support for this will be removed in %s. Please specify at least one valid capability for 'audioCapabilities' or 'videoCapabilities'.", milestoneString(56));

[foolip, 2016/09/23 08:18:39]

This needs an Intent to Deprecate and Remove on blink-dev. Since there's no use
counter data yet, some reason to think usage is low will be needed, to not risk
committing to removal and then having to delay/revert. If this isn't in a hurry,
then adding the use counter first would be less effort probably.

[jrummell, 2016/09/29 20:40:01]

Removed message for now until we get some data.

+
     case UseCounter::UntrustedEventDefaultHandled:
         return String::format("A DOM event generated from JavaScript has triggered a default action inside the browser. This behavior is non-standard and will be removed in %s. See https://www.chromestatus.com/features/5718803933560832 for more details.", milestoneString(53));