Bug 1558915 - Use infallible nsIURI::SchemeIs in toolkit/ r=Ehsan

Differential Revision: https://phabricator.services.mozilla.com/D40323

--HG--
extra : moz-landing-system : lando

toolkit/components/antitracking/AntiTrackingCommon.cpp

@@ -220,10 +220,7 @@ int32_t CookiesBehavior(nsILoadInfo* aLoadInfo,
 
   // WebExtensions 3rd party URI always get BEHAVIOR_ACCEPT as cookieBehavior,
   // this is semantically equivalent to the principal having a AddonPolicy().
-  bool is3rdPartyMozExt = false;
-  if (NS_SUCCEEDED(
-          a3rdPartyURI->SchemeIs("moz-extension", &is3rdPartyMozExt)) &&
-      is3rdPartyMozExt) {
+  if (a3rdPartyURI->SchemeIs("moz-extension")) {
     return nsICookieService::BEHAVIOR_ACCEPT;
   }
 

toolkit/components/antitracking/StorageAccess.cpp

@@ -138,12 +138,8 @@ static StorageAccess InternalStorageAllowedCheck(
   if (!uri) {
     Unused << aPrincipal->GetURI(getter_AddRefs(uri));
   }
-  if (uri) {
-    bool isAbout = false;
-    MOZ_ALWAYS_SUCCEEDS(uri->SchemeIs("about", &isAbout));
-    if (isAbout) {
-      return access;
-    }
+  if (uri && uri->SchemeIs("about")) {
+    return access;
   }
 
   if (!StorageDisabledByAntiTracking(aWindow, aChannel, aPrincipal, aURI,

toolkit/components/places/nsNavBookmarks.cpp

@@ -1919,10 +1919,7 @@ nsNavBookmarks::OnPageChanged(nsIURI* aURI, uint32_t aChangedAttribute,
     changeData.bookmark.type = TYPE_BOOKMARK;
 
     // Favicons may be set to either pure URIs or to folder URIs
-    bool isPlaceURI;
-    rv = aURI->SchemeIs("place", &isPlaceURI);
-    NS_ENSURE_SUCCESS(rv, rv);
-    if (isPlaceURI) {
+    if (aURI->SchemeIs("place")) {
       nsNavHistory* history = nsNavHistory::GetHistoryService();
       NS_ENSURE_TRUE(history, NS_ERROR_OUT_OF_MEMORY);
 

toolkit/components/url-classifier/nsUrlClassifierStreamUpdater.cpp

@@ -178,8 +178,7 @@ nsresult nsUrlClassifierStreamUpdater::FetchUpdate(
   // purposes.
   // This is only used for testing and should be deleted.
   bool match;
-  if ((NS_SUCCEEDED(aUpdateUrl->SchemeIs("file", &match)) && match) ||
-      (NS_SUCCEEDED(aUpdateUrl->SchemeIs("data", &match)) && match)) {
+  if (aUpdateUrl->SchemeIs("file") || aUpdateUrl->SchemeIs("data")) {
     mChannel->SetContentType(
         NS_LITERAL_CSTRING("application/vnd.google.safebrowsing-update"));
   } else {

toolkit/components/windowwatcher/nsWindowWatcher.cpp

@@ -617,7 +617,7 @@ nsresult nsWindowWatcher::OpenWindowInternal(
     if (NS_FAILED(rv)) {
       return rv;
     }
-    uriToLoad->SchemeIs("chrome", &uriToLoadIsChrome);
+    uriToLoadIsChrome = uriToLoad->SchemeIs("chrome");
   }
 
   bool nameSpecified = false;

toolkit/mozapps/extensions/AddonContentPolicy.cpp

@@ -112,10 +112,8 @@ AddonContentPolicy::ShouldLoad(nsIURI* aContentLocation, nsILoadInfo* aLoadInfo,
   // Only apply this policy to requests from documents loaded from
   // moz-extension URLs, or to resources being loaded from moz-extension URLs.
   bool equals;
-  if (!((NS_SUCCEEDED(aContentLocation->SchemeIs("moz-extension", &equals)) &&
-         equals) ||
-        (NS_SUCCEEDED(requestOrigin->SchemeIs("moz-extension", &equals)) &&
-         equals))) {
+  if (!(aContentLocation->SchemeIs("moz-extension") ||
+        requestOrigin->SchemeIs("moz-extension"))) {
     return NS_OK;
   }
 

toolkit/mozapps/extensions/AddonManagerWebAPI.cpp

@@ -55,9 +55,7 @@ bool AddonManagerWebAPI::IsValidSite(nsIURI* uri) {
     return false;
   }
 
-  bool isSecure;
-  nsresult rv = uri->SchemeIs("https", &isSecure);
-  if (NS_FAILED(rv) || !isSecure) {
+  if (!uri->SchemeIs("https")) {
     if (!(xpc::IsInAutomation() &&
           Preferences::GetBool("extensions.webapi.testing.http", false))) {
       return false;

toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp

@@ -175,10 +175,7 @@ static nsresult GetProxyFromEnvironment(const nsACString& aScheme,
 
   // Is there a way to specify "socks://" or something in these environment
   // variables? I can't find any documentation.
-  bool isHTTP;
-  rv = proxyURI->SchemeIs("http", &isHTTP);
-  NS_ENSURE_SUCCESS(rv, rv);
-  if (!isHTTP) return NS_ERROR_UNKNOWN_PROTOCOL;
+  if (!proxyURI->SchemeIs("http")) return NS_ERROR_UNKNOWN_PROTOCOL;
 
   nsAutoCString proxyHost;
   rv = proxyURI->GetHost(proxyHost);

toolkit/xre/nsAppRunner.cpp

@@ -1001,16 +1001,11 @@ nsXULAppInfo::GetServerURL(nsIURL** aServerURL) {
 
 NS_IMETHODIMP
 nsXULAppInfo::SetServerURL(nsIURL* aServerURL) {
-  bool schemeOk;
-  // only allow https or http URLs
-  nsresult rv = aServerURL->SchemeIs("https", &schemeOk);
-  NS_ENSURE_SUCCESS(rv, rv);
-  if (!schemeOk) {
-    rv = aServerURL->SchemeIs("http", &schemeOk);
-    NS_ENSURE_SUCCESS(rv, rv);
-
-    if (!schemeOk) return NS_ERROR_INVALID_ARG;
+  // Only allow https or http URLs
+  if (!aServerURL->SchemeIs("http") && !aServerURL->SchemeIs("https")) {
+    return NS_ERROR_INVALID_ARG;
   }
+
   nsAutoCString spec;
   rv = aServerURL->GetSpec(spec);
   NS_ENSURE_SUCCESS(rv, rv);