[log] Update LogAllMaps to also log maps from readonly space

With --trace-maps, we log all maps in the heap at the end of
bootstrapping. LogAllMaps scans through the heap and logs a map-create
even for all the maps in the heap. This cl updates this function to also
look for maps in the read only space.

Change-Id: I50025a909691be8dca3455c0583a0392b4756aef
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2162725Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67366}

src/logging/log.cc

@@ -19,6 +19,7 @@
 #include "src/execution/runtime-profiler.h"
 #include "src/execution/vm-state-inl.h"
 #include "src/handles/global-handles.h"
+#include "src/heap/combined-heap.h"
 #include "src/init/bootstrapper.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/interpreter/interpreter.h"
@@ -1838,7 +1839,7 @@ void Logger::LogAccessorCallbacks() {
 void Logger::LogAllMaps() {
   DisallowHeapAllocation no_gc;
   Heap* heap = isolate_->heap();
-  HeapObjectIterator iterator(heap);
+  CombinedHeapObjectIterator iterator(heap);
   for (HeapObject obj = iterator.Next(); !obj.is_null();
        obj = iterator.Next()) {
     if (!obj.IsMap()) continue;