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

src/arm/stub-cache-arm.cc

Index: src/arm/stub-cache-arm.cc
===================================================================
--- src/arm/stub-cache-arm.cc	(revision 4906)
+++ src/arm/stub-cache-arm.cc	(working copy)
@@ -155,7 +155,8 @@
 void StubCompiler::GenerateDirectLoadGlobalFunctionPrototype(
     MacroAssembler* masm, int index, Register prototype) {
   // Get the global function with the given index.
-  JSFunction* function = JSFunction::cast(Top::global_context()->get(index));
+  JSFunction* function = JSFunction::cast(
+      Isolate::Current()->global_context()->get(index));
   // Load its initial map. The global functions all have initial maps.
   __ Move(prototype, Handle<Map>(function->initial_map()));
   // Load the prototype from the initial map.