Bug 1896709 - Part 5: Add ScriptLoadRequest::IsCacheable. r=nbp

Differential Revision: https://phabricator.services.mozilla.com/D215874

js/loader/ScriptLoadRequest.cpp

@@ -159,6 +159,20 @@ const ModuleLoadRequest* ScriptLoadRequest::AsModuleRequest() const {
   return static_cast<const ModuleLoadRequest*>(this);
 }
 
+bool ScriptLoadRequest::IsCacheable() const {
+  if (HasScriptLoadContext() && GetScriptLoadContext()->mIsInline) {
+    return false;
+  }
+
+  if (mExpirationTime == 0) {
+    return true;
+  }
+
+  uint32_t now = nsContentUtils::SecondsFromPRTime(PR_Now());
+
+  return mExpirationTime > now;
+}
+
 void ScriptLoadRequest::NoCacheEntryFound() {
   MOZ_ASSERT(IsCheckingCache());
   MOZ_ASSERT(mURI);

js/loader/ScriptLoadRequest.h

@@ -111,6 +111,8 @@ class ScriptLoadRequest : public nsISupports,
   ModuleLoadRequest* AsModuleRequest();
   const ModuleLoadRequest* AsModuleRequest() const;
 
+  bool IsCacheable() const;
+
   uint32_t ExpirationTime() const { return mExpirationTime; }
 
   void SetMinimumExpirationTime(uint32_t aExpirationTime) {