Add MediaKeySession.keystatuseschange event

Source/modules/encryptedmedia/MediaKeySession.h

Index: Source/modules/encryptedmedia/MediaKeySession.h
diff --git a/Source/modules/encryptedmedia/MediaKeySession.h b/Source/modules/encryptedmedia/MediaKeySession.h
index 45f12935178ddca544e74840374219b9f89ae2dd..da3d69eb4e88d37dfd51ce9cf48b06cc29165056 100644
--- a/Source/modules/encryptedmedia/MediaKeySession.h
+++ b/Source/modules/encryptedmedia/MediaKeySession.h
@@ -102,6 +102,7 @@ private:
     virtual void message(const unsigned char* message, size_t messageLength, const WebURL& destinationURL) override;
     virtual void close() override;
     virtual void expirationChanged(double updatedExpiryTimeInMS) override;

[ddorwin, 2015/01/20 20:04:16]

"Changed" is the past tense here. Everything else appears to not be past tense,
so we should probably change this one. WDYT?

[jrummell, 2015/01/20 22:06:45]

Sure. I'll do it as a separate CL since it is already being called.

+    virtual void keysStatusesChange(bool hasAdditionalUsableKey, const WebVector<WebEncryptedMediaKeyInformation>&) override;

[ddorwin, 2015/01/20 20:04:16]

nit: I think we should swap the parameter order. The bool is "extra"
information. WDYT?

[jrummell, 2015/01/20 22:06:45]

Done.

 
     // Called by NewSessionResult when the new session has been created.
     void finishGenerateRequest();