Add a getter for the address and size of the code range to the pulic API

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index 1a8944995d32d419213214de5ce977c326a6205f..ef55357163924af08705b59366101e4747069b46 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -880,6 +880,10 @@ class CodeRange {
     DCHECK(valid());
     return static_cast<Address>(code_range_->address());
   }
+  size_t size() {
+    DCHECK(valid());
+    return code_range_->size();
+  }
   bool contains(Address address) {
     if (!valid()) return false;
     Address start = static_cast<Address>(code_range_->address());