Don't include MediaKeySystemAccess without EME.

This also removes checks for EME content in documents.
This removes practical use of EME by no longer having a keying system. (no-op)
tag #26

dom/base/Navigator.cpp

@@ -97,8 +97,10 @@
 #endif
 #include "mozilla/dom/ContentChild.h"
 
+#ifdef MOZ_EME
 #include "mozilla/EMEUtils.h"
 #include "mozilla/DetailedPromise.h"
+#endif
 
 namespace mozilla {
 namespace dom {
@@ -214,7 +216,9 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Navigator)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mServiceWorkerContainer)
 
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
+#ifdef MOZ_EME
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaKeySystemAccessManager)
+#endif
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPresentation)
 #ifdef MOZ_GAMEPAD
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGamepadServiceTest)
@@ -288,10 +292,12 @@ Navigator::Invalidate()
 
   mServiceWorkerContainer = nullptr;
 
+#ifdef MOZ_EME
   if (mMediaKeySystemAccessManager) {
     mMediaKeySystemAccessManager->Shutdown();
     mMediaKeySystemAccessManager = nullptr;
   }
+#endif
 
 #ifdef MOZ_GAMEPAD
   if (mGamepadServiceTest) {
@@ -1884,6 +1890,7 @@ Navigator::GetUserAgent(nsPIDOMWindowInner* aWindow, nsIURI* aURI,
   return siteSpecificUA->GetUserAgentForURIAndWindow(aURI, aWindow, aUserAgent);
 }
 
+#ifdef MOZ_EME
 static nsCString
 ToCString(const nsString& aString)
 {
@@ -2009,6 +2016,7 @@ Navigator::RequestMediaKeySystemAccess(const nsAString& aKeySystem,
   mMediaKeySystemAccessManager->Request(promise, aKeySystem, aConfigs);
   return promise.forget();
 }
+#endif
 
 Presentation*
 Navigator::GetPresentation(ErrorResult& aRv)

dom/base/Navigator.h

@@ -18,7 +18,9 @@
 #include "nsString.h"
 #include "nsTArray.h"
 #include "nsWeakPtr.h"
+#ifdef MOZ_EME
 #include "mozilla/dom/MediaKeySystemAccessManager.h"
+#endif
 
 class nsPluginArray;
 class nsMimeTypeArray;
@@ -258,12 +260,14 @@ public:
   // any, else null.
   static already_AddRefed<nsPIDOMWindowInner> GetWindowFromGlobal(JSObject* aGlobal);
 
+#ifdef MOZ_EME
   already_AddRefed<Promise>
   RequestMediaKeySystemAccess(const nsAString& aKeySystem,
                               const Sequence<MediaKeySystemConfiguration>& aConfig,
                               ErrorResult& aRv);
 private:
   RefPtr<MediaKeySystemAccessManager> mMediaKeySystemAccessManager;
+#endif
 
 public:
   void NotifyVRDisplaysUpdated();

dom/base/nsDocument.cpp

@@ -4340,6 +4340,7 @@ nsDocument::SetScopeObject(nsIGlobalObject* aGlobal)
   }
 }
 
+#ifdef MOZ_EME
 static void
 CheckIfContainsEMEContent(nsISupports* aSupports, void* aContainsEME)
 {
@@ -4363,6 +4364,7 @@ nsDocument::ContainsEMEContent()
                              static_cast<void*>(&containsEME));
   return containsEME;
 }
+#endif // MOZ_EME
 
 static void
 CheckIfContainsMSEContent(nsISupports* aSupports, void* aContainsMSE)
@@ -8390,11 +8392,13 @@ nsDocument::CanSavePresentation(nsIRequest *aNewRequest)
   }
 #endif // MOZ_WEBRTC
 
+#ifdef MOZ_EME
   // Don't save presentations for documents containing EME content, so that
   // CDMs reliably shutdown upon user navigation.
   if (ContainsEMEContent()) {
     return false;
   }
+#endif
 
   // Don't save presentations for documents containing MSE content, to
   // reduce memory usage.

dom/base/nsDocument.h

@@ -1267,7 +1267,9 @@ public:
 
   js::ExpandoAndGeneration mExpandoAndGeneration;
 
+#ifdef MOZ_EME
   bool ContainsEMEContent();
+#endif
 
   bool ContainsMSEContent();
 

dom/webidl/Navigator.webidl

@@ -348,12 +348,14 @@ partial interface Navigator {
   readonly attribute LegacyMozTCPSocket mozTCPSocket;
 };
 
+#ifdef MOZ_EME
 partial interface Navigator {
   [Pref="media.eme.apiVisible", NewObject]
   Promise<MediaKeySystemAccess>
   requestMediaKeySystemAccess(DOMString keySystem,
                               sequence<MediaKeySystemConfiguration> supportedConfigurations);
 };
+#endif
 
 #ifdef NIGHTLY_BUILD
 partial interface Navigator {