Reland "[turbofan] Support new.target in the serializer."

This is a reland of 3145505a,
after removing the clashing Register name binding.

Original change's description:
> [turbofan] Support new.target in the serializer.
>
> Bug: v8:7790
> Change-Id: Ie98cff6f8b1f184c8152952cc3d39e373c93565d
> Reviewed-on: https://chromium-review.googlesource.com/c/1435943
> Commit-Queue: Georg Neis <neis@chromium.org>
> Reviewed-by: Maya Lekova <mslekova@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59118}

Tbr: mslekova@chromium.org
Bug: v8:7790
Change-Id: I354d7907342e1f040d01eecc8b51ffca6e83c28d
Reviewed-on: https://chromium-review.googlesource.com/c/1442233
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59160}

src/compiler/serializer-for-background-compilation.h

@@ -5,6 +5,7 @@
 #ifndef V8_COMPILER_SERIALIZER_FOR_BACKGROUND_COMPILATION_H_
 #define V8_COMPILER_SERIALIZER_FOR_BACKGROUND_COMPILATION_H_
 
+#include "src/base/optional.h"
 #include "src/handles.h"
 #include "src/maybe-handles.h"
 #include "src/zone/zone-containers.h"
@@ -143,6 +144,7 @@ class Hints {
   void Add(const Hints& other);
 
   void Clear();
+  bool IsEmpty() const;
 
  private:
   ZoneVector<Handle<Object>> constants_;
@@ -164,6 +166,7 @@ class SerializerForBackgroundCompilation {
  private:
   SerializerForBackgroundCompilation(JSHeapBroker* broker, Zone* zone,
                                      CompilationSubject function,
+                                     base::Optional<Hints> new_target,
                                      const HintsVector& arguments);
 
   void TraverseBytecode();
@@ -175,13 +178,16 @@ class SerializerForBackgroundCompilation {
 
   class Environment;
 
-  void ProcessCallOrConstruct(const Hints& callee, const HintsVector& arguments,
+  void ProcessCallOrConstruct(const Hints& callee,
+                              base::Optional<Hints> new_target,
+                              const HintsVector& arguments,
                               bool with_spread = false);
   void ProcessCallVarArgs(interpreter::BytecodeArrayIterator* iterator,
                           ConvertReceiverMode receiver_mode,
                           bool with_spread = false);
 
   Hints RunChildSerializer(CompilationSubject function,
+                           base::Optional<Hints> new_target,
                            const HintsVector& arguments, bool with_spread);
 
   JSHeapBroker* broker() const { return broker_; }

src/ostreams.cc

@@ -52,9 +52,9 @@ int DbgStreamBuf::sync() {
   }
 
   if (pbase() != pptr()) {
-    OutputDebugStringA(
-      std::string(pbase(),
-      static_cast<std::string::size_type>(pptr() - pbase())).c_str());
+    OutputDebugStringA(std::string(pbase(), static_cast<std::string::size_type>(
+                                                pptr() - pbase()))
+                           .c_str());
     setp(pbase(), epptr());
   }
 #endif