Add Timeline to dart:developer

runtime/include/dart_tools_api.h

Index: runtime/include/dart_tools_api.h
diff --git a/runtime/include/dart_tools_api.h b/runtime/include/dart_tools_api.h
index 0e279e0daded57c2e9de5299ed0997edd9a18f85..6d1567c7231e300561db55ba0d68272d9190d7c1 100644
--- a/runtime/include/dart_tools_api.h
+++ b/runtime/include/dart_tools_api.h
@@ -891,19 +891,22 @@ DART_EXPORT int64_t Dart_TimelineGetMicros();
 #define DART_TIMELINE_STREAM_API (1 << 0)
 /** Timeline stream for compiler events */
 #define DART_TIMELINE_STREAM_COMPILER (1 << 1)
+/** Timeline stream for Dart provided events */
+#define DART_TIMELINE_STREAM_DART (1 << 2)
 /** Timeline stream for embedder provided events */
-#define DART_TIMELINE_STREAM_EMBEDDER (1 << 2)
+#define DART_TIMELINE_STREAM_EMBEDDER (1 << 3)
 /** Timeline stream for GC events */
-#define DART_TIMELINE_STREAM_GC (1 << 3)
+#define DART_TIMELINE_STREAM_GC (1 << 4)
 /** Timeline stream for isolate events */
-#define DART_TIMELINE_STREAM_ISOLATE (1 << 4)
+#define DART_TIMELINE_STREAM_ISOLATE (1 << 5)
 
 /** Timeline stream for VM events */
-#define DART_TIMELINE_STREAM_VM (1 << 5)
+#define DART_TIMELINE_STREAM_VM (1 << 6)
 
 /** Enable all timeline stream recording for an isolate */
 #define DART_TIMELINE_STREAM_ALL (DART_TIMELINE_STREAM_API |                   \
                                   DART_TIMELINE_STREAM_COMPILER |              \
+                                  DART_TIMELINE_STREAM_DART |                  \
                                   DART_TIMELINE_STREAM_EMBEDDER |              \
                                   DART_TIMELINE_STREAM_GC |                    \
                                   DART_TIMELINE_STREAM_ISOLATE)
@@ -966,7 +969,7 @@ typedef enum {
 typedef void (*Dart_StreamConsumer)(
     Dart_StreamConsumer_State state,
     const char* stream_name,
-    uint8_t* buffer,
+    const uint8_t* buffer,
     intptr_t buffer_length,
     void* stream_callback_data);