Serializer: prepare support for INTERNAL_REFERENCE_ENCODED.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 243b449fb65814068dbd886b166c72a6951cbae0..1c43944710523483d8406e0a62714790746f45a2 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -379,6 +379,9 @@ class RelocInfo {
     EXTERNAL_REFERENCE,  // The address of an external C++ function.
     INTERNAL_REFERENCE,  // An address inside the same function.
 
+    // Encoded internal reference, used only on MIPS, MIPS64 and PPC.
+    INTERNAL_REFERENCE_ENCODED,
+
     // Marks constant and veneer pools. Only used on ARM and ARM64.
     // They use a custom noncompact encoding.
     CONST_POOL,
@@ -394,10 +397,6 @@ class RelocInfo {
     CODE_AGE_SEQUENCE,  // Not stored in RelocInfo array, used explictly by
                         // code aging.
 
-    // Encoded internal reference, used only on MIPS and MIPS64.
-    // Re-uses previous ARM-only encoding, to fit in RealRelocMode space.
-    INTERNAL_REFERENCE_ENCODED = CONST_POOL,
-
     FIRST_REAL_RELOC_MODE = CODE_TARGET,
     LAST_REAL_RELOC_MODE = VENEER_POOL,
     FIRST_PSEUDO_RELOC_MODE = CODE_AGE_SEQUENCE,