Issue #618 - (async, preload) Correctly pass info about async/defer to parser.

This makes sure we don't block body-referred sub-resources by head-referenced
defer and async scripts. This is important for all script loads, not just
modules, but is added here because it was run into while implementing modules.

1 files changed, 12 insertions, 1 deletions

diff --git a/parser/html/nsHtml5SpeculativeLoad.h b/parser/html/nsHtml5SpeculativeLoad.h
index 6f1365bcf..fcc84de4f 100644
--- a/parser/html/nsHtml5SpeculativeLoad.h
+++ b/parser/html/nsHtml5SpeculativeLoad.h
@@ -128,7 +128,9 @@ class nsHtml5SpeculativeLoad {
                            nsHtml5String aType,
                            nsHtml5String aCrossOrigin,
                            nsHtml5String aIntegrity,
-                           bool aParserInHead)
+                           bool aParserInHead,
+                           bool aAsync,
+                           bool aDefer)
     {
       NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
                       "Trying to reinitialize a speculative load!");
@@ -139,6 +141,8 @@ class nsHtml5SpeculativeLoad {
       aType.ToString(mTypeOrCharsetSourceOrDocumentMode);
       aCrossOrigin.ToString(mCrossOrigin);
       aIntegrity.ToString(mIntegrity);
+      mIsAsync = aAsync;
+      mIsDefer = aDefer;
     }
 
     inline void InitStyle(nsHtml5String aUrl,
@@ -221,6 +225,13 @@ class nsHtml5SpeculativeLoad {
 
   private:
     eHtml5SpeculativeLoad mOpCode;
+
+    /**
+     * Whether the refering element has async and/or defer attributes.
+     */
+    bool mIsAsync;
+    bool mIsDefer;
+
     nsString mUrl;
     nsString mReferrerPolicy;
     nsString mMetaCSP;