chore: cherry-pick 6aa1e71fbd09 from v8 (#26199)

patches/v8/.patches

@@ -7,4 +7,5 @@ workaround_an_undefined_symbol_error.patch
 do_not_export_private_v8_symbols_on_windows.patch
 revert_cleanup_switch_offset_of_to_offsetof_where_possible.patch
 fix_build_deprecated_attirbute_for_older_msvc_versions.patch
+cherry-pick-6aa1e71fbd09.patch
 perf_make_getpositioninfoslow_faster.patch

patches/v8/cherry-pick-6aa1e71fbd09.patch

@@ -0,0 +1,70 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Andreas Haas <ahaas@chromium.org>
+Date: Tue, 25 Aug 2020 11:46:46 +0200
+Subject: Merged: [wasm][streaming] Avoid aborting the stream after it finished
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+With WebAssembly streaming compilation it is possible that FinishStream
+indirectly calls AbortStream. This had the effect that while
+FinishStream fulfilled the promise, AbortStream disposed the promise
+by removing the compile job from the wasm engine and thereby deallocated
+AsyncCompileJob and all the state that belongs to it. Without that
+state, FinishStream could not finish fulfilling the promise correctly.
+
+With this CL the streaming decoder remembers that the stream has
+already been finished. When the stream has been finished, all calls to
+Abort get ignored.
+
+The regression test for this issue requires the Chrome embedding, see
+https://crrev.com/c/2368359
+
+R=​clemensb@chromium.org
+NOTRY=true
+NOPRESUBMIT=true
+NOTREECHECKS=true
+
+(cherry picked from commit 32dd54709cd2ecdfc553aff3f7ab5377ff7c91a2)
+
+Bug: chromium:1117258
+Change-Id: Ifc28a1ee38c228b051c4d7d85b305fe2a721fa1f
+Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2367858
+Commit-Queue: Andreas Haas <ahaas@chromium.org>
+Reviewed-by: Clemens Backes <clemensb@chromium.org>
+Cr-Original-Commit-Position: refs/heads/master@{#69549}
+Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2465830
+Cr-Commit-Position: refs/branch-heads/8.6@{#22}
+Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1}
+Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472}
+
+diff --git a/src/wasm/streaming-decoder.cc b/src/wasm/streaming-decoder.cc
+index eb2978070074981f20b0e2f27401bce39e0029d9..88f40b9a00df75231b9938a4691c1330d047b070 100644
+--- a/src/wasm/streaming-decoder.cc
++++ b/src/wasm/streaming-decoder.cc
+@@ -214,6 +214,7 @@ class V8_EXPORT_PRIVATE AsyncStreamingDecoder : public StreamingDecoder {
+   bool code_section_processed_ = false;
+   uint32_t module_offset_ = 0;
+   size_t total_size_ = 0;
++  bool stream_finished_ = false;
+ 
+   // We need wire bytes in an array for deserializing cached modules.
+   std::vector<uint8_t> wire_bytes_for_deserializing_;
+@@ -258,6 +259,8 @@ size_t AsyncStreamingDecoder::DecodingState::ReadBytes(
+ 
+ void AsyncStreamingDecoder::Finish() {
+   TRACE_STREAMING("Finish\n");
++  DCHECK(!stream_finished_);
++  stream_finished_ = true;
+   if (!ok()) return;
+ 
+   if (deserializing()) {
+@@ -298,6 +301,8 @@ void AsyncStreamingDecoder::Finish() {
+ 
+ void AsyncStreamingDecoder::Abort() {
+   TRACE_STREAMING("Abort\n");
++  if (stream_finished_) return;
++  stream_finished_ = true;
+   if (!ok()) return;  // Failed already.
+   processor_->OnAbort();
+   Fail();