Bug 1609815 - Remove Web Replay C++ implementation. r=jgilbert,jandem,gbrown

Patch by bhackett and jlaster. Also reviewed by mccr8.

Differential Revision: https://phabricator.services.mozilla.com/D60197

dom/base/nsFrameMessageManager.cpp

@@ -52,7 +52,6 @@
 #include "mozilla/dom/ipc/StructuredCloneData.h"
 #include "mozilla/dom/DOMStringList.h"
 #include "mozilla/jsipc/CrossProcessObjectWrappers.h"
-#include "mozilla/recordreplay/ParentIPC.h"
 #include "nsPrintfCString.h"
 #include "nsXULAppAPI.h"
 #include "nsQueryObject.h"
@@ -594,35 +593,11 @@ class MMListenerRemover {
   RefPtr<nsFrameMessageManager> mMM;
 };
 
-// When recording or replaying, return whether a message should be received in
-// the middleman process instead of the recording/replaying process.
-static bool DirectMessageToMiddleman(const nsAString& aMessage) {
-  // Middleman processes run developer tools server code and need to receive
-  // debugger related messages. The session store flush message needs to be
-  // received in order to cleanly shutdown the process.
-  return (StringBeginsWith(aMessage, NS_LITERAL_STRING("debug:")) &&
-          recordreplay::parent::DebuggerRunsInMiddleman()) ||
-         aMessage.EqualsLiteral("SessionStore:flush");
-}
-
 void nsFrameMessageManager::ReceiveMessage(
     nsISupports* aTarget, nsFrameLoader* aTargetFrameLoader, bool aTargetClosed,
     const nsAString& aMessage, bool aIsSync, StructuredCloneData* aCloneData,
     mozilla::jsipc::CpowHolder* aCpows, nsIPrincipal* aPrincipal,
     nsTArray<StructuredCloneData>* aRetVal, ErrorResult& aError) {
-  // If we are recording or replaying, we will end up here in both the
-  // middleman process and the recording/replaying process. Ignore the message
-  // in one of the processes, so that it is only received in one place.
-  if (recordreplay::IsRecordingOrReplaying()) {
-    if (DirectMessageToMiddleman(aMessage)) {
-      return;
-    }
-  } else if (recordreplay::IsMiddleman()) {
-    if (!DirectMessageToMiddleman(aMessage)) {
-      return;
-    }
-  }
-
   MOZ_ASSERT(aTarget);
 
   nsAutoTObserverArray<nsMessageListenerInfo, 1>* listeners =