Add pause/resume for isolates in vmservice/observatory.

runtime/vm/json_stream.h

Index: runtime/vm/json_stream.h
diff --git a/runtime/vm/json_stream.h b/runtime/vm/json_stream.h
index 60d40258566651b22f0ca6224bbf8ab53fa8dddb..1e40f6625088f5a92ee1f87a9fa2b4407f117c0d 100644
--- a/runtime/vm/json_stream.h
+++ b/runtime/vm/json_stream.h
@@ -11,6 +11,7 @@
 
 namespace dart {
 
+class DebuggerEvent;
 class Field;
 class GrowableObjectArray;
 class Instance;
@@ -84,6 +85,7 @@ class JSONStream : ValueObject {
   void PrintfValue(const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
   void PrintValue(const Object& o, bool ref = true);
   void PrintValue(SourceBreakpoint* bpt);
+  void PrintValue(const DebuggerEvent* event);
   void PrintValue(Isolate* isolate, bool ref = true);
 
   void PrintPropertyBool(const char* name, bool b);
@@ -95,6 +97,8 @@ class JSONStream : ValueObject {
   PRINTF_ATTRIBUTE(3, 4);
   void PrintProperty(const char* name, const Object& o, bool ref = true);
 
+  void PrintProperty(const char* name, const DebuggerEvent* event);
+  void PrintProperty(const char* name, Isolate* isolate);
   void PrintPropertyName(const char* name);
   void PrintCommaIfNeeded();
   bool NeedComma();
@@ -151,6 +155,12 @@ class JSONObject : public ValueObject {
   void AddProperty(const char* name, const Object& obj, bool ref = true) const {
     stream_->PrintProperty(name, obj, ref);
   }
+  void AddProperty(const char* name, const DebuggerEvent* event) const {
+    stream_->PrintProperty(name, event);
+  }
+  void AddProperty(const char* name, Isolate* isolate) const {
+    stream_->PrintProperty(name, isolate);
+  }
   void AddPropertyF(const char* name, const char* format, ...) const
       PRINTF_ATTRIBUTE(3, 4);
 
@@ -193,6 +203,9 @@ class JSONArray : public ValueObject {
   void AddValue(SourceBreakpoint* bpt) const {
     stream_->PrintValue(bpt);
   }
+  void AddValue(const DebuggerEvent* event) const {
+    stream_->PrintValue(event);
+  }
   void AddValueF(const char* format, ...) const PRINTF_ATTRIBUTE(2, 3);
 
  private: