Add dart:developer.postEvent for posting events to the service protocol from Dart code

runtime/vm/json_stream.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/json_stream.h"
 #include "vm/message.h"
@@ skipping 244 matching lines @@
   }
 }
 
 
 void JSONStream::AppendSerializedObject(const char* serialized_object) {
   PrintCommaIfNeeded();
   buffer_.AddString(serialized_object);
 }
 
 
+void JSONStream::AppendSerializedObject(const char* property_name,
+                                        const char* serialized_object) {
+  PrintCommaIfNeeded();
+  PrintPropertyName(property_name);
+  buffer_.AddString(serialized_object);
+}
+
 void JSONStream::Clear() {
   buffer_.Clear();
   open_objects_ = 0;
 }
 
 
 void JSONStream::OpenObject(const char* property_name) {
   PrintCommaIfNeeded();
   open_objects_++;
   if (property_name != NULL) {
@@ skipping 553 matching lines @@
   intptr_t len2 = OS::VSNPrint(p, len+1, format, args);
   va_end(args);
   ASSERT(len == len2);
   stream_->buffer_.AddChar('"');
   stream_->AddEscapedUTF8String(p);
   stream_->buffer_.AddChar('"');
   free(p);
 }
 
 }  // namespace dart