Revert "EME: Fail requestMediaKeySystemAccess if no capabilities specified"

third_party/WebKit/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.cpp

Index: third_party/WebKit/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.cpp
diff --git a/third_party/WebKit/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.cpp b/third_party/WebKit/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.cpp
index 9d0f6def3c1b803f46a9dd0a70b40eaffebe874b..ed45f7defc71c6dc3b236df73e7336ededfc964a 100644
--- a/third_party/WebKit/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.cpp
+++ b/third_party/WebKit/Source/modules/encryptedmedia/NavigatorRequestMediaKeySystemAccess.cpp
@@ -123,6 +123,12 @@ class MediaKeySystemAccessInitializer final : public EncryptedMediaRequest {
   // robustness string.
   void checkVideoCapabilityRobustness() const;
 
+  // Log UseCounter if selected configuration does not have at least one of
+  // 'audioCapabilities' and 'videoCapabilities' non-empty.
+  // TODO(jrummell): Switch to deprecation message once we have data.
+  // See http://crbug.com/616233.
+  void checkCapabilities(const WebMediaKeySystemConfiguration&);
+
   Member<ScriptPromiseResolver> m_resolver;
   const String m_keySystem;
   WebVector<WebMediaKeySystemConfiguration> m_supportedConfigurations;