Fix TargetSpace() method for box type.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 2cc232c50a75147c2c82bf17619c48ebd8562073..34bfdb93d41085516a81a34d986ced5c2bc1c64d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -355,7 +355,6 @@ const int kStubMinorKeyBits = kBitsPerInt - kSmiTagSize - kStubMajorKeyBits;
   V(ODDBALL_TYPE)                                                              \
   V(CELL_TYPE)                                                                 \
   V(PROPERTY_CELL_TYPE)                                                        \
-  V(BOX_TYPE)                                                                  \
                                                                                \
   V(HEAP_NUMBER_TYPE)                                                          \
   V(FOREIGN_TYPE)                                                              \
@@ -393,6 +392,7 @@ const int kStubMinorKeyBits = kBitsPerInt - kSmiTagSize - kStubMajorKeyBits;
   V(POLYMORPHIC_CODE_CACHE_TYPE)                                               \
   V(TYPE_FEEDBACK_INFO_TYPE)                                                   \
   V(ALIASED_ARGUMENTS_ENTRY_TYPE)                                              \
+  V(BOX_TYPE)                                                                  \
                                                                                \
   V(FIXED_ARRAY_TYPE)                                                          \
   V(FIXED_DOUBLE_ARRAY_TYPE)                                                   \
@@ -679,7 +679,6 @@ enum InstanceType {
   ODDBALL_TYPE,
   CELL_TYPE,
   PROPERTY_CELL_TYPE,
-  BOX_TYPE,
 
   // "Data", objects that cannot contain non-map-word pointers to heap
   // objects.
@@ -718,6 +717,7 @@ enum InstanceType {
   POLYMORPHIC_CODE_CACHE_TYPE,
   TYPE_FEEDBACK_INFO_TYPE,
   ALIASED_ARGUMENTS_ENTRY_TYPE,
+  BOX_TYPE,
   // The following two instance types are only used when ENABLE_DEBUGGER_SUPPORT
   // is defined. However as include/v8.h contain some of the instance type
   // constants always having them avoids them getting different numbers