[DevTools] V8StackTrace: Add the ability to limit the max async depth...

... when building inspector objects.

This is useful in Chromium, when recording the initiator information
for navigations.

See https://chromium-review.googlesource.com/c/chromium/src/+/1674885

Change-Id: Ib9ddcaf05586ca1f48a31921a20ab11a703ec7b0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1677381Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Commit-Queue: Johannes Henkel <johannes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62389}

include/v8-inspector.h

@@ -109,6 +109,8 @@ class V8_EXPORT V8StackTrace {
   virtual ~V8StackTrace() = default;
   virtual std::unique_ptr<protocol::Runtime::API::StackTrace>
   buildInspectorObject() const = 0;
+  virtual std::unique_ptr<protocol::Runtime::API::StackTrace>
+  buildInspectorObject(int maxAsyncDepth) const = 0;
   virtual std::unique_ptr<StringBuffer> toString() const = 0;
 
   // Safe to pass between threads, drops async chain.

src/inspector/v8-stack-trace-impl.cc

@@ -285,6 +285,12 @@ V8StackTraceImpl::buildInspectorObject() const {
   return buildInspectorObjectImpl(nullptr);
 }
 
+std::unique_ptr<protocol::Runtime::API::StackTrace>
+V8StackTraceImpl::buildInspectorObject(int maxAsyncDepth) const {
+  return buildInspectorObjectImpl(nullptr,
+                                  std::min(maxAsyncDepth, m_maxAsyncDepth));
+}
+
 std::unique_ptr<StringBuffer> V8StackTraceImpl::toString() const {
   String16Builder stackTrace;
   for (size_t i = 0; i < m_frames.size(); ++i) {

src/inspector/v8-stack-trace-impl.h

@@ -78,6 +78,8 @@ class V8StackTraceImpl : public V8StackTrace {
   StringView topFunctionName() const override;
   std::unique_ptr<protocol::Runtime::API::StackTrace> buildInspectorObject()
       const override;
+  std::unique_ptr<protocol::Runtime::API::StackTrace> buildInspectorObject(
+      int maxAsyncDepth) const override;
   std::unique_ptr<StringBuffer> toString() const override;
 
   bool isEqualIgnoringTopFrame(V8StackTraceImpl* stackTrace) const;