Made Isolate a mandatory parameter for everything Handle-related.

src/disassembler.h

Index: src/disassembler.h
diff --git a/src/disassembler.h b/src/disassembler.h
index 4a87dca678172c5361cd3276f3cd37f18b74e51c..8789150036791ea15df6d05f9bd4ccb78dbdcaba 100644
--- a/src/disassembler.h
+++ b/src/disassembler.h
@@ -41,7 +41,7 @@ class Disassembler : public AllStatic {
   // Decode instructions in the the interval [begin, end) and print the
   // code into f. Returns the number of bytes disassembled or 1 if no
   // instruction could be decoded.
-  static int Decode(FILE* f, byte* begin, byte* end);
+  static int Decode(Isolate* isolate, FILE* f, byte* begin, byte* end);
 
   // Decode instructions in code.
   static void Decode(FILE* f, Code* code);