Debugger support to display global variables

runtime/vm/debugger.h

Index: runtime/vm/debugger.h
===================================================================
--- runtime/vm/debugger.h	(revision 9118)
+++ runtime/vm/debugger.h	(working copy)
@@ -114,8 +114,6 @@
 };
 
 
-
-
 // ActivationFrame represents one dart function activation frame
 // on the call stack.
 class ActivationFrame : public ZoneAllocated {
@@ -130,6 +128,7 @@
   RawString* QualifiedFunctionName();
   RawString* SourceUrl();
   RawScript* SourceScript();
+  RawLibrary* Library();
   intptr_t TokenIndex();
   intptr_t LineNumber();
 
@@ -264,6 +263,7 @@
   RawArray* GetInstanceFields(const Instance& obj);
   RawArray* GetStaticFields(const Class& cls);
   RawArray* GetLibraryFields(const Library& lib);
+  RawArray* GetGlobalFields(const Library& lib);
 
   intptr_t CacheObject(const Object& obj);
   RawObject* GetCachedObject(intptr_t obj_id);
@@ -317,6 +317,10 @@
   bool ShouldPauseOnException(DebuggerStackTrace* stack_trace,
                               const Object& exc);
 
+  void CollectLibraryFields(const GrowableObjectArray& field_list,
+                            const Library& lib,
+                            const String& prefix);
+
   Isolate* isolate_;
   bool initialized_;
   BreakpointHandler* bp_handler_;