Bug 1653214 - Part 1: Merge implementations of nsDocShell::Create into nsDocShell::InitWindow; r=nika

Differential Revision: https://phabricator.services.mozilla.com/D83766

docshell/base/nsDocShell.h

@@ -194,11 +194,13 @@ class nsDocShell final : public nsDocLoader,
   NS_DECL_NSINETWORKINTERCEPTCONTROLLER
   NS_DECL_NSIDEPRECATIONWARNER
 
-  // Create a new nsDocShell object, initializing it.
+  // Create a new nsDocShell object.
   static already_AddRefed<nsDocShell> Create(
       mozilla::dom::BrowsingContext* aBrowsingContext,
       uint64_t aContentWindowID = 0);
 
+  bool Initialize();
+
   NS_IMETHOD Stop() override {
     // Need this here because otherwise nsIWebNavigation::Stop
     // overrides the docloader's Stop()
@@ -1186,7 +1188,7 @@ class nsDocShell final : public nsDocLoader,
   bool mInEnsureScriptEnv;
 #endif
 
-  bool mCreated : 1;
+  bool mInitialized : 1;
   bool mAllowSubframes : 1;
   bool mAllowJavascript : 1;
   bool mAllowMetaRedirects : 1;