Disentangle assembler from isolate.

src/disassembler.cc

Index: src/disassembler.cc
diff --git a/src/disassembler.cc b/src/disassembler.cc
index 2e10b71cd2599b78f743e61fde4c42d0a429b901..29262f411b50f0071160d45987a9d3f890ed20dc 100644
--- a/src/disassembler.cc
+++ b/src/disassembler.cc
@@ -160,8 +160,7 @@ static int DecodeIt(Isolate* isolate, std::ostream* os,
     // Print all the reloc info for this instruction which are not comments.
     for (int i = 0; i < pcs.length(); i++) {
       // Put together the reloc info
-      RelocInfo relocinfo(isolate, pcs[i], rmodes[i], datas[i],
-                          converter.code());
+      RelocInfo relocinfo(pcs[i], rmodes[i], datas[i], converter.code());
 
       // Indent the printing of the reloc info.
       if (i == 0) {