Changes to pass the current isolate to all runtime and native calls.

runtime/vm/handles.cc

Index: runtime/vm/handles.cc
===================================================================
--- runtime/vm/handles.cc	(revision 1496)
+++ runtime/vm/handles.cc	(working copy)
@@ -69,15 +69,15 @@
 }
 
 
-HandleScope::HandleScope() : StackResource() {
-  ASSERT(isolate()->no_handle_scope_depth() == 0);
-  VMHandles* handles = isolate()->current_zone()->handles();
+HandleScope::HandleScope(Isolate* isolate) : StackResource(isolate) {
+  ASSERT(isolate->no_handle_scope_depth() == 0);
+  VMHandles* handles = isolate->current_zone()->handles();
   ASSERT(handles != NULL);
   saved_handle_block_ = handles->scoped_blocks_;
   saved_handle_slot_ = handles->scoped_blocks_->next_handle_slot();
 #if defined(DEBUG)
-  link_ = isolate()->top_handle_scope();
-  isolate()->set_top_handle_scope(this);
+  link_ = isolate->top_handle_scope();
+  isolate->set_top_handle_scope(this);
 #endif
 }
 
@@ -98,8 +98,8 @@
 
 
 #if defined(DEBUG)
-NoHandleScope::NoHandleScope() : StackResource() {
-  isolate()->IncrementNoHandleScopeDepth();
+NoHandleScope::NoHandleScope(Isolate* isolate) : StackResource(isolate) {
+  isolate->IncrementNoHandleScopeDepth();
 }