Improve stack traces for async functions

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

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/inspector/v8-stack-trace-impl.h"
 
 #include "src/inspector/string-util.h"
 #include "src/inspector/v8-debugger.h"
 #include "src/inspector/v8-inspector-impl.h"
 #include "src/inspector/v8-profiler-agent-impl.h"
@@ skipping 135 matching lines @@
   V8StackTraceImpl* deepest = result.get();
   while (deepest && maxAsyncCallChainDepth) {
     deepest = deepest->m_parent.get();
     maxAsyncCallChainDepth--;
   }
   if (deepest) deepest->m_parent.reset();
 
   return result;
 }
 
+// static
 std::unique_ptr<V8StackTraceImpl> V8StackTraceImpl::capture(
     V8Debugger* debugger, int contextGroupId, size_t maxStackSize,
     const String16& description) {
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   v8::HandleScope handleScope(isolate);
   v8::Local<v8::StackTrace> stackTrace;
   if (isolate->InContext()) {
     if (debugger) {
       V8InspectorImpl* inspector = debugger->inspector();
       V8ProfilerAgentImpl* profilerAgent =
@@ skipping 105 matching lines @@
     stackTrace.append(String16::fromInteger(frame.lineNumber()));
     stackTrace.append(':');
     stackTrace.append(String16::fromInteger(frame.columnNumber()));
     stackTrace.append(')');
   }
   String16 string = stackTrace.toString();
   return StringBufferImpl::adopt(string);
 }
 
 }  // namespace v8_inspector