Add functionality to get full stack trace when exceptions are thrown.

runtime/vm/object.h

Index: runtime/vm/object.h
===================================================================
--- runtime/vm/object.h	(revision 19025)
+++ runtime/vm/object.h	(working copy)
@@ -6293,16 +6293,19 @@
   void Append(const GrowableObjectArray& func_list,
               const GrowableObjectArray& code_list,
               const GrowableObjectArray& pc_offset_list) const;
+  void SetCatchStacktrace(const Array& func_array,
+                          const Array& code_array,
+                          const Array& pc_offset_array) const;
 
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawStacktrace));
   }
-  static RawStacktrace* New(const GrowableObjectArray& func_list,
-                            const GrowableObjectArray& code_list,
-                            const GrowableObjectArray& pc_offset_list,
+  static RawStacktrace* New(const Array& func_array,
+                            const Array& code_array,
+                            const Array& pc_offset_array,
                             Heap::Space space = Heap::kNew);
 
-  const char* ToCStringInternal(bool verbose) const;
+  RawString* FullStacktrace() const;
 
  private:
   void set_function_array(const Array& function_array) const;