Support narrowing a cpu profile to a given time window

runtime/vm/profiler_service.h

Index: runtime/vm/profiler_service.h
diff --git a/runtime/vm/profiler_service.h b/runtime/vm/profiler_service.h
index e9315984db08cf8233dd53048d46f0cc00ae341f..15f3f7d526c8041691c5bc672af32fb2865c297c 100644
--- a/runtime/vm/profiler_service.h
+++ b/runtime/vm/profiler_service.h
@@ -396,14 +396,20 @@ class ProfilerService : public AllStatic {
 
   static void PrintJSON(JSONStream* stream,
                         Profile::TagOrder tag_order,
-                        intptr_t extra_tags);
+                        intptr_t extra_tags,
+                        int64_t time_origin_micros,
+                        int64_t time_extent_micros);
 
   static void PrintAllocationJSON(JSONStream* stream,
                                   Profile::TagOrder tag_order,
-                                  const Class& cls);
+                                  const Class& cls,
+                                  int64_t time_origin_micros,
+                                  int64_t time_extent_micros);
 
   static void PrintTimelineJSON(JSONStream* stream,
-                                Profile::TagOrder tag_order);
+                                Profile::TagOrder tag_order,
+                                int64_t time_origin_micros,
+                                int64_t time_extent_micros);
 
   static void ClearSamples();