[Isolates] Move contents of Top into Isolate....

src/assembler.cc

Index: src/assembler.cc
===================================================================
--- src/assembler.cc	(revision 4906)
+++ src/assembler.cc	(working copy)
@@ -564,8 +564,8 @@
   : address_(reinterpret_cast<Address>(counter->GetInternalPointer())) {}
 
 
-ExternalReference::ExternalReference(Top::AddressId id)
-  : address_(Top::get_address_from_id(id)) {}
+ExternalReference::ExternalReference(Isolate::AddressId id)
+  : address_(Isolate::Current()->get_address_from_id(id)) {}
 
 
 ExternalReference::ExternalReference(const SCTableReference& table_ref)
@@ -674,7 +674,7 @@
 
 
 ExternalReference ExternalReference::scheduled_exception_address() {
-  return ExternalReference(Top::scheduled_exception_address());
+  return ExternalReference(Isolate::Current()->scheduled_exception_address());
 }